1
|
Xiao X, Bu H, Li Z, Li Z, Bai Q, Wang Z, Yan L, Liu D, Peng X, Jia X, Gao F. NADPH-Oxidase 2 Promotes Autophagy in Spinal Neurons During the Development of Morphine Tolerance. Neurochem Res 2021; 46:2089-2096. [PMID: 34008119 DOI: 10.1007/s11064-021-03347-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 04/13/2021] [Accepted: 05/12/2021] [Indexed: 01/26/2023]
Abstract
Repeated morphine administration results in analgesic tolerance. However, the underlying mechanism of morphine analgesic tolerance remains unclear. NADPH-oxidase 2 (NOX2) is the first discovered NADPH oxidase, which mainly functions to produce reactive oxygen species. Its specific role in morphine tolerance has not been fully investigated. In this work, we found that chronic morphine administration significantly increased the expression of NOX2 in spinal cord. Pretreatment of NOX2 inhibitor blocked the upregulation of NOX2 and autophagy markers, including LC3B and P62, and consequently the development of morphine tolerance. NOX2 and LC3B were both colocalized with NeuN in spinal dorsal horn in morphine-tolerant rats. Our results suggest that the increased autophagy activity in spinal neurons promoted by NOX2 activation contributes to the development of morphine tolerance. NOX2 may be considered as a new therapeutic target for morphine tolerance.
Collapse
Affiliation(s)
- Xuyang Xiao
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Huilian Bu
- Department of Pain Management, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhisong Li
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zheng Li
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Bai
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhitao Wang
- Department of Anesthesiology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lin Yan
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Daiqiang Liu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoling Peng
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoqian Jia
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Gao
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| |
Collapse
|
2
|
Chen Y, Chen Y, Zhang Y, Zhang D, Li G, Wei J, Hua X, Lv B, Liu L. Heterotrimeric G protein γ subunit DEP1 is involved in hydrogen peroxide signaling and promotes aerenchyma formation in rice roots. Plant Signal Behav 2021; 16:1889251. [PMID: 33632064 PMCID: PMC8078532 DOI: 10.1080/15592324.2021.1889251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Heterotrimeric G-protein α and β-subunits regulate H2O2-mediated aerenchyma formation. The rice G-protein γ-subunit, dense and erect panicle 1 (DEP1), is known to interact with the α-subunit and regulate nitrogen utilization and yield. However, it is unclear whether DEP1 regulates cell death for aerenchyma formation in rice roots. Using wild-type WYJ8 and its transgenic line WYJ8(DEP1), we confirmed that DEP1 is involved in H2O2-mediated aerenchyma formation. The rates of aerenchyma formation varied in different parts of the roots in both varieties, with the highest rate in the 4-7 cm segments, reaching a plateau in the 7-8 cm segments. Compared with WYJ8, the aerenchyma area and H2O2 content in WYJ8(DEP1) were increased by 55.98% and 53.37%, respectively; however, the responses of aerenchyma formation to exogenous H2O2 were basically the same in the two varieties. Diphenylene iodonium (DPI) treatment had no effect on H2O2 production and elimination processes in WYJ8, but significantly reduced the activity of the key enzyme that catalyzes H2O2 biosynthesis in WYJ8(DEP1). Importantly, exogenous H2O2 treatment did not offset the effect of the decrease in endogenous H2O2 level caused by DPI on aerenchyma formation. These results indicated that DEP1 enhanced H2O2 biosynthesis and promoted the cell death of the root cortex, thus contributing to aerenchyma development in WYJ8(DEP1).
Collapse
Affiliation(s)
- Yun Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Centre for Modern Production Technology of Grain Crops/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, China
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Yuanhua Chen
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Yajun Zhang
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Dongping Zhang
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Guoming Li
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Jiali Wei
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Xia Hua
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Bing Lv
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Lijun Liu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Centre for Modern Production Technology of Grain Crops/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, China
- CONTACT Lijun Liu College of Agriculture, Yangzhou University, Yangzhou 225009, P.R. China
| |
Collapse
|
3
|
Kuriiwa F, Kobayashi M, Mizukami H, Hara S. Mitochondrial toxins potentiate hydroxyl radical production in rat striatum during carbon monoxide poisoning. J Pharmacol Sci 2021; 146:29-32. [PMID: 33858652 DOI: 10.1016/j.jphs.2021.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/04/2021] [Accepted: 02/25/2021] [Indexed: 10/22/2022] Open
Abstract
Hydroxyl radical (•OH) production in the rat striatum during carbon monoxide (CO) poisoning, which inhibits complex IV, was enhanced synergistically by malonate, a mitochondrial complex II inhibitor, but not N-methyl-4-phenylpyridinium or NaCN, complex I and IV inhibitors, respectively. No such enhancement appeared in the case of NaCN combined with malonate. Intrastriatal dopamine, which is involved in •OH production by malonate, did not synergistically enhance CO-induced •OH production. Diphenyleneiodonium, a nonselective NADPH oxidase inhibitor, partly suppressed the potentiation of CO-induced •OH production by malonate. Impairment of mitochondrial functions might potentiate oxidative stress and intensify CO toxicity in the brain.
Collapse
Affiliation(s)
- Fumi Kuriiwa
- Department of Forensic Medicine, Tokyo Medical University, Tokyo 160-8402, Japan
| | - Masamune Kobayashi
- Department of Legal Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Hajime Mizukami
- Department of Legal Medicine, Kanazawa Medical University, Ishikawa 920-0293, Japan
| | - Shuichi Hara
- Department of Forensic Medicine, Tokyo Medical University, Tokyo 160-8402, Japan.
| |
Collapse
|
4
|
Sun Y, Liang W, Cheng H, Wang H, Lv D, Wang W, Liang M, Miao C. NADPH Oxidase-derived ROS promote mitochondrial alkalization under salt stress in Arabidopsis root cells. Plant Signal Behav 2021; 16:1856546. [PMID: 33315520 PMCID: PMC7889232 DOI: 10.1080/15592324.2020.1856546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/22/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
The plasma membrane NADPH Oxidase-derived ROS as signaling molecules play crucial roles in salt stress response. As the motor organelle of cells, mitochondria are also important for salt tolerance. However, the possible interaction between NADPH Oxidase-derived ROS and mitochondria is not well studied. Here, a transgenic Arabidopsis expressing mitochondrial matrix-targeted pH-sensitive indicator cpYFP was used to monitor the pH dynamics in root cells under salt stress. A significant alkalization in mitochondria was observed when the root was exposed to NaCl or KCl, but not osmotic stress such as isotonic mannitol. Interestingly, when pretreated with the NADPH Oxidase inhibitor DPI, the mitochondrial alkalization in root cells was largely abolished. Genetic evidence further showed that salt-induced mitochondrial alkalization was significantly reduced in the loss of function mutant atrbohF . Pretreatment with endocytosis-related inhibitor PAO or TyrA23, which inhibited the ROS accumulation under salt treatment, almost abolished this effect. Furthermore, [Ca2+]cyt increase might also play important roles by affecting ROS generation to mediate salt-induced mitochondrial alkalization as indicated by treatment with plasma membrane Ca2+ channel inhibitor LaCl3 and mitochondrial Ca2+ uniporter inhibitor Ruthenium Red. Together, these results suggest that the plasma membrane NADPH Oxidase-derived ROS promote the mitochondrial alkalization under salt treatment, providing a possible link between different cellular compartments under salt stress.
Collapse
Affiliation(s)
- Yanfeng Sun
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Weihong Liang
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Hui Cheng
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Huan Wang
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Dong Lv
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Wei Wang
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Modan Liang
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Chen Miao
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| |
Collapse
|
5
|
Wang Z, Rong D, Chen D, Xiao Y, Liu R, Wu S, Yamamuro C. Salicylic acid promotes quiescent center cell division through ROS accumulation and down-regulation of PLT1, PLT2, and WOX5. J Integr Plant Biol 2021; 63:583-596. [PMID: 33017089 DOI: 10.1111/jipb.13020] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 09/30/2020] [Indexed: 05/13/2023]
Abstract
Salicylic acid (SA) plays a crucial role in plant immunity. However, its function in plant development is poorly understood. The quiescent center (QC), which maintains columella stem cells (CSCs) in the root apical meristem and typically exhibits low levels of cell division, is critical for root growth and development. Here, we show that the Arabidopsis thaliana SA overaccumulation mutant constitutively activated cell death 1 (cad1), which exhibits increased cell division in the QC, is rescued by additional mutations in genes encoding the SA biosynthetic enzyme SALICYLIC ACID INDUCTION DEFFICIENT2 (SID2) or the SA receptor NONEXPRESSER OF PR GENES1 (NPR1), indicating that QC cell division in the cad1 mutant is promoted by the NPR1-dependent SA signaling pathway. The application of exogenous SA also promoted QC cell division in wild-type plants in a dose-dependent manner and largely suppressed the expression of genes involved in QC maintenance, including those encoding the APETALA2 (AP2) transcription factors PLETHORA1 (PLT1) and PLT2, as well as the homeodomain transcription factor WUSCHEL-RELATED HOMEOBOX5 (WOX5). Moreover, we showed that SA promotes reactive oxygen species (ROS) production, which is necessary for the QC cell division phenotype in the cad1 mutant. These results provide insight into the function of SA in QC maintenance.
Collapse
Affiliation(s)
- Zhuqing Wang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Duoyan Rong
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Hunan Engineering Research Centre of Lily Germplasm Resource in Novation and Deep Processing, College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou, 412007, China
| | - Dixing Chen
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yang Xiao
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Renyi Liu
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Center for Agroforestry Mega Data Science, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shuang Wu
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Chizuko Yamamuro
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| |
Collapse
|
6
|
Liu M, Wang D, Luo Y, Hu L, Bi Y, Ji J, Huang H, Wang G, Zhu L, Ma J, Kim E, Luo CK, Abbruzzese JL, Li X, Yang VW, Li Z, Lu W. Selective killing of cancer cells harboring mutant RAS by concomitant inhibition of NADPH oxidase and glutathione biosynthesis. Cell Death Dis 2021; 12:189. [PMID: 33594044 PMCID: PMC7887267 DOI: 10.1038/s41419-021-03473-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 12/28/2022]
Abstract
Oncogenic RAS is a critical driver for the initiation and progression of several types of cancers. However, effective therapeutic strategies by targeting RAS, in particular RASG12D and RASG12V, and associated downstream pathways have been so far unsuccessful. Treatment of oncogenic RAS-ravaged cancer patients remains a currently unmet clinical need. Consistent with a major role in cancer metabolism, oncogenic RAS activation elevates both reactive oxygen species (ROS)-generating NADPH oxidase (NOX) activity and ROS-scavenging glutathione biosynthesis. At a certain threshold, the heightened oxidative stress and antioxidant capability achieve a higher level of redox balance, on which cancer cells depend to gain a selective advantage on survival and proliferation. However, this prominent metabolic feature may irrevocably render cancer cells vulnerable to concurrent inhibition of both NOX activity and glutathione biosynthesis, which may be exploited as a novel therapeutic strategy. In this report, we test this hypothesis by treating the HRASG12V-transformed ovarian epithelial cells, mutant KRAS-harboring pancreatic and colon cancer cells of mouse and human origins, as well as cancer xenografts, with diphenyleneiodonium (DPI) and buthionine sulfoximine (BSO) combination, which inhibit NOX activity and glutathione biosynthesis, respectively. Our results demonstrate that concomitant targeting of NOX and glutathione biosynthesis induces a highly potent lethality to cancer cells harboring oncogenic RAS. Therefore, our studies provide a novel strategy against RAS-bearing cancers that warrants further mechanistic and translational investigation.
Collapse
Affiliation(s)
- Muyun Liu
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
- Department of Gastroenterology, No. 905 Hospital, Shanghai, China
| | - Dan Wang
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Yongde Luo
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
- School of Pharmaceutical Sciences & The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lianghao Hu
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Yawei Bi
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Juntao Ji
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Haojie Huang
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Guoqiang Wang
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Liang Zhu
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Jianjia Ma
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Eunice Kim
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Catherine K Luo
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - James L Abbruzzese
- Division of Medical Oncology, Department of Medicine, Duke Cancer Institute, Duke University, Durham, NC, USA
| | - Xiaokun Li
- School of Pharmaceutical Sciences & The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Vincent W Yang
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Zhaoshen Li
- Department of Gastroenterology, Changhai Hospital, Shanghai, China.
| | - Weiqin Lu
- Division of Gastroenterology and Hepatology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA.
| |
Collapse
|
7
|
Ren X, Wang M, Wang Y, Huang A. Superoxide anion generation response to wound in Arabidopsis hypocotyl cutting. Plant Signal Behav 2021; 16:1848086. [PMID: 33210579 PMCID: PMC7849726 DOI: 10.1080/15592324.2020.1848086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/05/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
Cutting is a frequently used model to study the process of adventitious root formation, and excision of cuttings leads to rapid wound response signaling. We recently showed that as a wound signal, reactive oxygen species (ROS, mainly hydrogen peroxide) participate in adventitious root induction of hypocotyl cuttings through regulation of auxin biosynthesis and transport. Here, superoxide anion (O2-•), an early type of ROS, exhibited rapid burst at the cutting site immediately in response to wounding in Arabidopsis hypocotyl cuttings. Diphenylene iodonium chloride (DPI, inhibitor of NADPH oxidase) overwhelmingly suppressed O2-• propagation through the hypocotyl. Compared to wild type, O2-• burst only occur in cut base, and upward transduction were inhibited completely in NADPH oxidase mutant AtRbohD. These results indicate O2-• generation and propagation in response to wound and via NADPH oxidase in adventitious root induction of hypocotyl cuttings.
Collapse
Affiliation(s)
- Xufang Ren
- College of Life Sciences, Shaanxi Normal University, Xi’an, China
| | - Mengfang Wang
- College of Life Sciences, Shaanxi Normal University, Xi’an, China
| | - Yongshun Wang
- College of Life Sciences, Shaanxi Normal University, Xi’an, China
| | - Aixia Huang
- College of Life Sciences, Shaanxi Normal University, Xi’an, China
| |
Collapse
|
8
|
Zhang X, Zhang Y, Ji Z, Wang F, Zhang L, Song M, Li H. Oxidative damage mechanism in Saccharomyces cerevisiae cells exposed to tetrachlorobisphenol A. Environ Toxicol Pharmacol 2020; 80:103507. [PMID: 33007436 DOI: 10.1016/j.etap.2020.103507] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 09/05/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
Tetrachlorobisphenol A (TCBPA) can promote intracellular reactive oxygen species (ROS) accumulation. However, limited attention has been given to mechanisms underlying TCBPA exposure-associated ROS accumulation. Here, such mechanisms were explored in the simple eukaryotic model organism Saccharomyces cerevisiae exposed to multiple concentrations of TCBPA. Addition of diphenyleneiodonium, a specific inhibitor of NADPH oxidase, blocked TCBPA treatment-associated intracellular ROS accumulation. NADPH oxidase can be activated by calcineurin, mitogen-activated protein kinase (MAPK), and tyrosine kinase. Therefore, corresponding specific inhibition respectively on these three kinases was performed and results suggested that the Ca2+ signaling pathway, MAPK pathway, and tyrosine kinase pathway all contributed to the TCBPA exposure-associated intracellular ROS accumulation. In addition, TCBPA exposure-associated up-regulation of genes involved in ROS production and down-regulation of catalase promoted ROS accumulation in S. cerevisiae. To sum up, our current results provide insights into the understanding of TCBPA exposure-associated ROS accumulation.
Collapse
Affiliation(s)
- Xiaoru Zhang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yaxian Zhang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Zhihua Ji
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Fengbang Wang
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Lei Zhang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Maoyong Song
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
| | - Hao Li
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China.
| |
Collapse
|
9
|
Lee SH, Lutz D, Drexler D, Frotscher M, Shen J. Differential modulation of short-term plasticity at hippocampal mossy fiber and Schaffer collateral synapses by mitochondrial Ca2. PLoS One 2020; 15:e0240610. [PMID: 33049001 PMCID: PMC7553293 DOI: 10.1371/journal.pone.0240610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 09/29/2020] [Indexed: 11/19/2022] Open
Abstract
Presynaptic mitochondrial Ca2+ plays a critical role in the regulation of synaptic transmission and plasticity. The presynaptic bouton of the hippocampal mossy fiber (MF) is much larger in size than that of the Schaffer collateral (SC) synapse. Here we compare the structural and physiological characteristics of MF and SC presynaptic boutons to reveal functional and mechanistic differences between these two synapses. Our quantitative ultrastructural analysis using electron microscopy show many more mitochondria in MF presynaptic bouton cross-section profiles compared to SC boutons. Consistent with these results, post-tetanic potentiation (PTP), a form of presynaptic short-term plasticity dependent on mitochondrial Ca2+, is reduced by inhibition of mitochondrial Ca2+ release at MF synapses but not at SC synapses. However, blockade of mitochondrial Ca2+ release results in reduction of PTP at SC synapses by disynaptic MF stimulation. Furthermore, inhibition of mitochondrial Ca2+ release selectively decreases frequency facilitation evoked by short trains of presynaptic stimulation at MF synapses, while having no effect at SC synapses. Moreover, depletion of ER Ca2+ stores leads to reduction of PTP at MF synapses, but PTP is unaffected by ER Ca2+ depletion at SC synapses. These findings show that MF and SC synapses differ in presynaptic mitochondrial content as well as mitochondrial Ca2+ dependent synaptic plasticity, highlighting differential regulatory mechanisms of presynaptic plasticity at MF and SC synapses.
Collapse
Affiliation(s)
- Sang Hun Lee
- Department of Neurology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - David Lutz
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dagmar Drexler
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Frotscher
- Institute for Structural Neurobiology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jie Shen
- Department of Neurology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
- Program in Neuroscience, Harvard Medical School, Boston, Massachusetts, United States of America
| |
Collapse
|
10
|
Chen Y, Dangol S, Wang J, Jwa NS. Focal Accumulation of ROS Can Block Pyricularia oryzae Effector BAS4-Expression and Prevent Infection in Rice. Int J Mol Sci 2020; 21:ijms21176196. [PMID: 32867341 PMCID: PMC7503722 DOI: 10.3390/ijms21176196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/18/2020] [Accepted: 08/25/2020] [Indexed: 01/03/2023] Open
Abstract
The reactive oxygen species (ROS) burst is the most common plant immunity mechanism to prevent pathogen infection, although the exact role of ROS in plant immunity has not been fully elucidated. We investigated the expression and translocation of Oryza sativa respiratory burst oxidase homologue B (OsRBOHB) during compatible and incompatible interactions between rice epidermal cells and the pathogenic fungus Pyricularia oryzae (syn. Magnaporthe oryzae). We characterized the functional role of ROS focal accumulation around invading hyphae during P. oryzae infection process using the OsRBOHB inhibitor diphenyleneiodonium (DPI) and the actin filament polymerization inhibitor cytochalasin (Cyt) A. OsRBOHB was strongly induced during incompatible rice–P. oryzae interactions, and newly synthesized OsRBOHB was focally distributed at infection sites. High concentrations of ROS focally accumulated at the infection sites and suppressed effector biotrophy-associated secreted (BAS) proteins BAS4 expression and invasive hyphal growth. DPI and Cyt A abolished ROS focal accumulation and restored P. oryzae effector BAS4 expression. These results suggest that ROS focal accumulation is able to function as an effective immune mechanism that blocks some effectors including BAS4-expression during P. oryzae infection. Disruption of ROS focal accumulation around invading hyphae enables successful P. oryzae colonization of rice cells and disease development.
Collapse
Affiliation(s)
- Yafei Chen
- Division of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Korea; (Y.C.); (S.D.); (J.W.)
| | - Sarmina Dangol
- Division of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Korea; (Y.C.); (S.D.); (J.W.)
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1090 GE Amsterdam, The Netherlands
| | - Juan Wang
- Division of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Korea; (Y.C.); (S.D.); (J.W.)
| | - Nam-Soo Jwa
- Division of Integrative Bioscience and Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Korea; (Y.C.); (S.D.); (J.W.)
- Correspondence: ; Tel.: +82-010-6477-1100
| |
Collapse
|
11
|
Keshtgar S, Ebrahimi B, Shid-Moosavi SM, Erfani N. NADPH oxidase 5 activation; a novel approach to human sperm cryoinjury. Cell Tissue Bank 2020; 21:675-684. [PMID: 32607683 DOI: 10.1007/s10561-020-09845-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 06/23/2020] [Indexed: 12/19/2022]
Abstract
Sperm cryopreservation leads to various structural and functional damages, some of which induce by oxidative stress. The reactive oxygen species (ROS) generates by mitochondria and membrane NADPH oxidases (NOXs). Among the NOXs, only NOX5 has been identified in the cell membrane of human sperm. This study was designed to clarify the possible role of NOX5 on sperm cryoinjury. Forty human semen samples were washed and randomly divided into fresh and cryopreserved groups. Each group was divided into 4 subgroups containing Ham's F10 (control), 0.1% DMSO (vehicle), 100 nM of PMA (phorbol 12-myristate 13-acetate) and 1 µM of DPI (diphenyleneiodonium), as NOX5 activator and inhibitor. The samples of cryopreserved groups were preserved in liquid nitrogen for 1 month. The sperm kinematics, membrane integrity, ROS production, apoptosis rate, mitochondrial membrane potential (MMP), intracellular ATP and calcium concentration [Ca2+]i were evaluated. The percent of sperm with intact membrane and motile sperm reduced significantly after thawing (p ≤ 0.01). The ROS production (p ≤ 0.01) and the apoptotic rate increased, MMP dissipated, and the percentage of live cells with high [Ca2+]i decreased significantly in the cryopreserved control group relative to the fresh control group. DPI, in contrast to PMA, improved sperm progressive motility (p ≤ 0.01), membrane integrity in fresh and cryopreserved groups and reduced the ROS amount in cryopreserved group (p ≤ 0.01). Apoptotic rate, [Ca2+]i, ATP, and MMP did not change with DPI and PMA in cryopreserved groups. We conclude that NOX5 activity in fresh sperm is low, and it increases during cryopreservation. NOX5 inhibition improves the cryopreserved sperm quality.
Collapse
Affiliation(s)
- Sara Keshtgar
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Zand Blvd, 71348-45794, Shiraz, Iran
| | - Bahareh Ebrahimi
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Zand Blvd, 71348-45794, Shiraz, Iran.
| | - Seyed Mostafa Shid-Moosavi
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Zand Blvd, 71348-45794, Shiraz, Iran
| | - Nasrollah Erfani
- Department of Immunology and Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, 71345-1798, Shiraz, Iran
| |
Collapse
|
12
|
Liu L, Huang L, Lin X, Sun C. Hydrogen peroxide alleviates salinity-induced damage through enhancing proline accumulation in wheat seedlings. Plant Cell Rep 2020; 39:567-575. [PMID: 32025801 DOI: 10.1007/s00299-020-02513-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 01/21/2020] [Indexed: 05/08/2023]
Abstract
NADPH oxidase-mediated H2O2 maintains proline concentration under NaCl stress through regulating its biosynthesis and degradation, conferring salt tolerance to wheat plants. Considerable attention has been paid to the specific role of hydrogen peroxide (H2O2) in plant stress responses. Here, using microscopic, pharmacological and biochemical approaches, we explored H2O2 production and its roles in redox control under salt stress in wheat roots. Exogenous H2O2 pretreatment decreased salt-induced lipid peroxidation, while increased proline content in wheat roots. Salt stress led to a transient increase in NADPH oxidase activity accompanied by accumulation of H2O2 and proline in roots. The elevated proline accumulation in the presence of NaCl was significantly suppressed by diphenyleneiodonium, an inhibitor of NADPH oxidase, and dimethylthiourea, a scavenger of H2O2. The rate-limiting enzyme involved in proline biosynthesis, Δ1-pyrroline-5-carboxylate synthetase (P5CS), was induced by NaCl, whereas the house-keeping enzyme in proline degradation, proline dehydrogenase (ProDH), was inhibited. After 6 h, the activity of P5CS increased by 1.5-fold, whereas ProDH decreased by 13.9%. The levels of these enzymes, however, were restored by NADPH oxidase inhibitor or H2O2 scavenger. After treatment with H2O2, the effects of diphenyleneiodonium and or dimethylthiourea on proline content and activities of P5CS and ProDH were reversed. These results suggested that NADPH oxidase-mediated H2O2 alleviates oxidative damage induced by salt stress through regulating proline biosynthesis and degradation.
Collapse
Affiliation(s)
- Lijuan Liu
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Lin Huang
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Chengliang Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
13
|
Nasimian A, Farzaneh P, Tamanoi F, Bathaie SZ. Cytosolic and mitochondrial ROS production resulted in apoptosis induction in breast cancer cells treated with Crocin: The role of FOXO3a, PTEN and AKT signaling. Biochem Pharmacol 2020; 177:113999. [PMID: 32353423 DOI: 10.1016/j.bcp.2020.113999] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 04/24/2020] [Indexed: 12/30/2022]
Abstract
Different groups have reported the Crocin anticancer activity. We previously showed Crocin-induced apoptosis in rat model of breast and gastric cancers, through the increased Bax/Bcl-2 ratio and caspases activity, as well as the cell cycle arrest in a p53-dependent manner. Since Crocin antioxidant activity has been shown under different conditions, it is interesting to elucidate its apoptotic mechanism. Here, we treated two breast cancer cell lines, MCF-7 and MDA-MB-231, with Crocin. MTT and ROS assays, cell cycle arrest, Bax/Bcl-2 ratio and caspase3 activity were determined. PARP cleavage and expression of some proteins were studied using Western blotting and immunofluorescence. The results indicated stepwise ROS generation in cytosol and mitochondria after Crocin treatment. Attenuating the early ROS level, using diphenyleneiodonium, diminished the sequent mitochondrial damage (decreasing Δψ) and downstream apoptotic signaling. Crocin induced ROS production, FOXO3a expression and nuclear translocation, and then, elevation of the expression of FOXO3a target genes (Bim and PTEN) and caspase-3 activation. Application of N-acetylcysteine blocked AKT/FOXO3a/Bim signaling. FOXO3a knockdown resulted in a decrease of Bim, PTEN and caspase 3, after Crocin treatment. PTEN knockdown caused a decrease in FOXO3a, Bim and caspase 3, in addition to an increase in p-AKT and p-FOXO3a, after Crocin treatment. In conclusion, Crocin induced apoptosis in MCF-7 and MDA-MB-231 human breast cancer cells. The ROS-activated FOXO3a cascade plays a central role in this process. FOXO3a-mediated upregulation of PTEN exerted a further inhibition of the AKT survival pathway. These data provide a new insight into applications of Crocin for cancer therapy.
Collapse
Affiliation(s)
- Ahmad Nasimian
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box: 14155-331, Tehran, Iran
| | - Parvaneh Farzaneh
- Human and Animal Cell Bank, Iranian Biological Resource Center (IBRC), ACECR, Tehran, Iran
| | - Fuyuhiko Tamanoi
- Department of Microbiology, Immunology & Molecular Genetics (MIMG), UCLA, LA, CA, USA
| | - S Zahra Bathaie
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box: 14155-331, Tehran, Iran.
| |
Collapse
|
14
|
Wang X, Ruan M, Wan Q, He W, Yang L, Liu X, He L, Yan L, Bi Y. Nitric oxide and hydrogen peroxide increase glucose-6-phosphate dehydrogenase activities and expression upon drought stress in soybean roots. Plant Cell Rep 2020; 39:63-73. [PMID: 31535176 DOI: 10.1007/s00299-019-02473-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 09/10/2019] [Indexed: 06/10/2023]
Abstract
KEY MESSAGE Changes in glucose-6-phosphate dehydrogenase (G6PD) isoforms activities and expression were investigated in soybean roots under drought, suggesting that cytosolic G6PD plays a main role by regulating H2O2 signal and redox homeostasis. G6PD acts a vital role in plant growth, development and stress adaptation. Drought (PEG6000 treatment) could markedly increase the enzymatic activities of cytosolic G6PD (Cyt-G6PD) and compartmented G6PD (mainly plastidic P2-G6PD) in soybean roots. Application of G6PD inhibitor upon drought condition dramatically decreased the intracellular NADPH and reduced glutathione levels in soybean roots. Nitric oxide (NO) and hydrogen peroxide (H2O2) participated in the regulation of Cyt-G6PD and P2-G6PD enzymatic activities under drought stress. Diphenylene iodonium (DPI), an inhibitor of NADPH oxidase, abolished the drought-induced accumulation of H2O2. The exogenous application of H2O2 and its production inhibitor (DPI) could stimulate and inhibit the NO accumulation, respectively, but not vice versa. qRT-PCR analysis confirmed that NO, as the downstream signal of H2O2, positively regulated the transcription of genes encoding Cyt-G6PD (GPD5, G6PD6, G6PD7) under drought stress in soybean roots. Comparatively, NO and H2O2 signals negatively regulated the gene expression of compartmented G6PD (GPD1, G6PD2, G6PD4), indicating that a post-transcriptional mechanism was involved in compartmented G6PD regulation. Taken together, the high Cyt-G6PD activity is essential for maintaining redox homeostasis upon drought condition in soybean roots, and the H2O2-dependent NO cascade signal is differently involved in Cyt-G6PD and compartmented G6PD regulation.
Collapse
Affiliation(s)
- Xiaomin Wang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, Qinghai, China
| | - Mengjiao Ruan
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Qi Wan
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Wenliang He
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Lei Yang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Xinyuan Liu
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Li He
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Lili Yan
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yurong Bi
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China.
| |
Collapse
|
15
|
Yan JJ, Tong ZJ, Liu YY, Lin ZY, Long Y, Han X, Xu WN, Huang QH, Tao YX, Xie BG. The NADPH oxidase in Volvariella volvacea and its differential expression in response to mycelial ageing and mechanical injury. Braz J Microbiol 2019; 51:87-94. [PMID: 31667800 DOI: 10.1007/s42770-019-00165-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 04/29/2019] [Indexed: 02/03/2023] Open
Abstract
NADPH oxidases are enzymes that have been reported to generate reactive oxygen species (ROS) in animals, plants and many multicellular fungi in response to environmental stresses. Six genes of the NADPH oxidase complex components, including vvnoxa, vvnoxb, vvnoxr, vvbema, vvrac1 and vvcdc24, were identified based on the complete genomic sequence of the edible fungus Volvariella volvacea. The number of vvnoxa, vvrac1, vvbema and vvcdc24 transcripts fluctuated with ageing, and the gene expression patterns of vvnoxa, vvrac1 and vvbema were significantly positively correlated. However, the expression of vvnoxb and vvnoxr showed no significant difference during ageing. In hyphae subjected to mechanical injury stress, both O2- and H2O2 concentrations were increased. The expression of vvnoxa, vvrac1, vvbema and vvcdc24 was substantially upregulated, but vvnoxb and vvnoxr showed no response to mechanical injury stress at the transcriptional level. Additionally, the transcription of vvnoxa, vvrac1, vvbema and vvcdc24 could be repressed when the intracellular ROS were eliminated by diphenyleneiodonium (DPI) chloride and reduced glutathione (GSH) treatments. These results indicated a positive feedback loop involving NADPH oxidase and intracellular ROS, which might be the reason for the oxidative burst during injury stress.
Collapse
Affiliation(s)
- Jun-Jie Yan
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Zong-Jun Tong
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Yuan-Yuan Liu
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Zi-Yan Lin
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Ying Long
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Xing Han
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wei-Nan Xu
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Qian-Hui Huang
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yong-Xin Tao
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Bao-Gui Xie
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
| |
Collapse
|
16
|
Huang Y, Cao H, Yang L, Chen C, Shabala L, Xiong M, Niu M, Liu J, Zheng Z, Zhou L, Peng Z, Bie Z, Shabala S. Tissue-specific respiratory burst oxidase homolog-dependent H2O2 signaling to the plasma membrane H+-ATPase confers potassium uptake and salinity tolerance in Cucurbitaceae. J Exp Bot 2019; 70:5879-5893. [PMID: 31290978 PMCID: PMC6812723 DOI: 10.1093/jxb/erz328] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 07/03/2019] [Indexed: 05/02/2023]
Abstract
Potassium (K+) is a critical determinant of salinity tolerance, and H2O2 has been recognized as an important signaling molecule that mediates many physiological responses. However, the details of how H2O2 signaling regulates K+ uptake in the root under salt stress remain elusive. In this study, salt-sensitive cucumber and salt-tolerant pumpkin which belong to the same family, Cucurbitaceae, were used to answer the above question. We show that higher salt tolerance in pumpkin was related to its superior ability for K+ uptake and higher H2O2 accumulation in the root apex. Transcriptome analysis showed that salinity induced 5816 (3005 up- and 2811 down-) and 4679 (3965 up- and 714 down-) differentially expressed genes (DEGs) in cucumber and pumpkin, respectively. DEGs encoding NADPH oxidase (respiratory burst oxidase homolog D; RBOHD), 14-3-3 protein (GRF12), plasma membrane H+-ATPase (AHA1), and potassium transporter (HAK5) showed higher expression in pumpkin than in cucumber under salinity stress. Treatment with the NADPH oxidase inhibitor diphenylene iodonium resulted in lower RBOHD, GRF12, AHA1, and HAK5 expression, reduced plasma membrane H+-ATPase activity, and lower K+ uptake, leading to a loss of the salinity tolerance trait in pumpkin. The opposite results were obtained when the plants were pre-treated with exogenous H2O2. Knocking out of RBOHD in pumpkin by CRISPR/Cas9 [clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9] editing of coding sequences resulted in lower root apex H2O2 and K+ content and GRF12, AHA1, and HAK5 expression, ultimately resulting in a salt-sensitive phenotype. However, ectopic expression of pumpkin RBOHD in Arabidopsis led to the opposite effect. Taken together, this study shows that RBOHD-dependent H2O2 signaling in the root apex is important for pumpkin salt tolerance and suggests a novel mechanism that confers this trait, namely RBOHD-mediated transcriptional and post-translational activation of plasma membrane H+-ATPase operating upstream of HAK5 K+ uptake transporters.
Collapse
Affiliation(s)
- Yuan Huang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
| | - Haishun Cao
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Li Yang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Chen Chen
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Lana Shabala
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
| | - Mu Xiong
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Mengliang Niu
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Juan Liu
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
| | - Zuhua Zheng
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Lijian Zhou
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Zhaowen Peng
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Zhilong Bie
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, PR China
| | - Sergey Shabala
- Tasmanian Institute for Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tasmania, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, PR China
| |
Collapse
|
17
|
Zou Y, Zhang X, Tan Y, Huang JB, Zheng Z, Tao LZ. Phosphoethanolamine N-methyltransferase 1 contributes to maintenance of root apical meristem by affecting ROS and auxin-regulated cell differentiation in Arabidopsis. New Phytol 2019; 224:258-273. [PMID: 31246280 DOI: 10.1111/nph.16028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 06/15/2019] [Indexed: 06/09/2023]
Abstract
The continuous growth of roots requires the balance between cell division and differentiation. Reactive oxygen species (ROS) and auxin are important regulators of root development by affecting cell division and differentiation. The mechanism controlling the coordination of cell division and differentiation is not well understood. Using a forward genetic screen, we isolated a mutant, defective primary root 2 (dpr2), defective in root apical meristem (RAM) maintenance. The DPR2 gene encodes phosphoethanolamine N-methyltransferase 1 (PEAMT1) that catalyzes phosphocholine biosynthesis in Arabidopsis. We characterized the primary root phenotypes of dpr2 using various marker lines, using histochemical and pharmacological analysis to probe early root development. Loss-of-function of DPR2/PEAMT1 resulted in RAM consumption by affecting root stem cell niche, division zone, elongation and differentiation zone (EDZ). PIN-FORMED (PIN) protein abundance, PIN2 polar distribution and general endocytosis were impaired in the root tip of dpr2. Excess hydrogen peroxide and auxin accumulate in the EDZ of dpr2, leading to RAM consumption by accelerating cell differentiation. Suppression of ROS over-accumulation or inhibition of auxin signalling partially prevent RAM differentiation in dpr2 after choline starvation. Taken together, we conclude that the EDZ of the root tip is most sensitive to choline shortage, leading to RAM consumption through an ROS-auxin regulation module.
Collapse
Affiliation(s)
- Yi Zou
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Xiaojing Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Yunyi Tan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Jia-Bao Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zhiqiong Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Li-Zhen Tao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| |
Collapse
|
18
|
Kim JS, Jeong K, Murphy JM, Rodriguez YAR, Lim STS. A Quantitative Method to Measure Low Levels of ROS in Nonphagocytic Cells by Using a Chemiluminescent Imaging System. Oxid Med Cell Longev 2019; 2019:1754593. [PMID: 31285782 PMCID: PMC6594271 DOI: 10.1155/2019/1754593] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/07/2019] [Accepted: 05/19/2019] [Indexed: 12/13/2022]
Abstract
Chemiluminescence (CL) is one of the most useful methods for detecting reactive oxygen species (ROS). Although fluorescence dyes or genetically encoded biosensors have been developed, CL is still used due to its high sensitivity, ease of use, and low cost. While initially established and used to measure high levels of ROS in phagocytic cells, CL assays are not ideal for measuring low levels of ROS. Here, we developed a newly modified CL assay using a chemiluminescent imaging system for measuring low concentrations of ROS in nonphagocytic cells. We found that dissolving luminol in NaOH, rather than DMSO, increased the H2O2-induced CL signal and that the addition of 4-iodophenylboronic acid (4IPBA) further increased CL intensity. Our new system also increased the rate and intensity of the CL signal in phorbol 12-myristate 13-acetate- (PMA-) treated HT-29 colon cancer cells compared to those in luminol only. We were able to quantify ROS levels from both cells and media in parallel using an H2O2 standard. A significant benefit to our system is that we can easily measure stimulus-induced ROS formation in a real-time manner and also investigate intracellular signaling pathways from a single sample simultaneously. We found that PMA induced tyrosine phosphorylation of protein tyrosine kinases (PTKs), such as focal adhesion kinase (FAK), protein tyrosine kinase 2 (Pyk2), and Src, and increased actin stress fiber formation in a ROS-dependent manner. Interestingly, treatment with either N-acetyl-L-cysteine (NAC) or diphenyleneiodonium (DPI) reduced the PMA-stimulated phosphorylation of these PTKs, implicating a potential role in cellular ROS signaling. Thus, our newly optimized CL assay using 4IPBA and a chemiluminescent imaging method provides a simple, real-time, and low-cost method for the quantification of low levels of ROS.
Collapse
Affiliation(s)
- Jun-Sub Kim
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL 36688, USA
- Department of Biotechnology, Korea National University of Transportation, Jeungpyeong 27909, Republic of Korea
| | - Kyuho Jeong
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL 36688, USA
| | - James M. Murphy
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL 36688, USA
| | - Yelitza A. R. Rodriguez
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL 36688, USA
| | - Ssang-Taek Steve Lim
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama, Mobile, AL 36688, USA
| |
Collapse
|
19
|
de Souza LF, Pearson AG, Pace PE, Dafre AL, Hampton MB, Meotti FC, Winterbourn CC. Peroxiredoxin expression and redox status in neutrophils and HL-60 cells. Free Radic Biol Med 2019; 135:227-234. [PMID: 30862546 DOI: 10.1016/j.freeradbiomed.2019.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/25/2019] [Accepted: 03/06/2019] [Indexed: 01/08/2023]
Abstract
Peroxiredoxins (Prxs) are thiol peroxidases with a key role in antioxidant defense and redox signaling. They could be important in neutrophils for handling the large amount of oxidants that these cells produce. We investigated the redox state of Prx1 and Prx2 in HL-60 promyelocytic cells differentiated to neutrophil-like cells (dHL-60) and in human neutrophils. HL-60 cell differentiation with dimethyl sulfoxide caused a large decrease in expression of both Prxs, and all-trans retinoic acid also decreased Prx1 expression. Prx1 was mostly reduced in dHL-60 cells. NADPH oxidase activation by phorbol myristate acetate (PMA) or ingestion of Staphylococcus aureus induced rapid oxidation to disulfide-linked dimers, and eventually hyperoxidation. The NADPH oxidase inhibitor, diphenyleneiodonium, prevented Prx1 dimerization in stimulated dHL-60 cells, and decreased the extent of oxidation under resting conditions. In contrast, Prx1 and Prx2 were present in neutrophils from human blood as disulfides, and PMA or S. aureus caused no further oxidation. They remained oxidized on incubation with diphenyleneiodonium in media. Although this suggests that Prx redox cycling could be deficient in neutrophils, thioredoxin expression and thioredoxin reductase activity were similar in neutrophils and dHL-60 cells. Additionally, neutrophil thioredoxin was initially reduced and underwent oxidation after PMA activation. Thus, although the Prxs respond to oxidant generation in dHL-60 cells, in neutrophils they appear "locked" as disulfides. On this basis we propose that neutrophil Prxs are inefficient antioxidants and contribute little to peroxide removal during the oxidative burst, and speculate that they might be involved in other cell processes.
Collapse
Affiliation(s)
- Luiz F de Souza
- Departamento de Bioquímica, Instituto de Química (IQUSP), Universidade de São Paulo, São Paulo, SP, CEP 05508-000, Brazil
| | - Andree G Pearson
- Centre for Free Radical Research, Department of Pathology and Biomedical Science, University of Otago Christchurch, PO Box 4345, Christchurch, 8040, New Zealand
| | - Paul E Pace
- Centre for Free Radical Research, Department of Pathology and Biomedical Science, University of Otago Christchurch, PO Box 4345, Christchurch, 8040, New Zealand
| | - Alcir L Dafre
- Departamento de Bioquímica, Centro de ciências biológicas, Universidade Federal de Santa Catarina, Florianópolis, SC, CEP 88040-900, Brazil
| | - Mark B Hampton
- Centre for Free Radical Research, Department of Pathology and Biomedical Science, University of Otago Christchurch, PO Box 4345, Christchurch, 8040, New Zealand
| | - Flávia C Meotti
- Departamento de Bioquímica, Instituto de Química (IQUSP), Universidade de São Paulo, São Paulo, SP, CEP 05508-000, Brazil.
| | - Christine C Winterbourn
- Centre for Free Radical Research, Department of Pathology and Biomedical Science, University of Otago Christchurch, PO Box 4345, Christchurch, 8040, New Zealand.
| |
Collapse
|
20
|
Lin HH, King YC, Li YC, Lin CC, Chen YC, Lin JS, Jeng ST. The p38-like MAP kinase modulated H 2O 2 accumulation in wounding signaling pathways of sweet potato. Plant Sci 2019; 280:305-313. [PMID: 30824008 DOI: 10.1016/j.plantsci.2018.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 12/11/2018] [Accepted: 12/13/2018] [Indexed: 06/09/2023]
Abstract
In sweet potato (Ipomoea batatas cv Tainung 57), MAPK cascades are involved in the regulation of Ipomoelin (IPO) expression upon wounding. p38 MAPK plays an important role in plant's responses to various environmental stresses. However, the role of p38-like MAPK in wounding response is still unknown. In this study, the levels of phosphorylated-p38-like MAPK (pp38-like MAPK) in sweet potato were noticeably reduced after wounding. In addition, SB203580 (SB), a specific inhibitor blocking p38 MAPK phosphorylation, considerably decreased the accumulation of pp38-like MAPK. Expression of a wound-inducible gene IPO was elevated by SB. Moreover, it stimulated hydrogen peroxide (H2O2) production rather than cytosolic Ca2+ elevation in sweet potato leaves. However, NADPH oxidase (NOX) inhibitor diphenyleneiodonium could not inhibit IPO induction stimulated by SB. These results indicated a p38-like MAPK mechanism was involved in the regulation of IPO expression through NOX-independent H2O2 generation. In addition, the presence of the protein phosphatase inhibitor okadaic acid or the MEK1/ERK inhibitor PD98059 repressed the H2O2- or SB-induced IPO expression, demonstrating phosphatase(s) and MEK1/ERK functioning in the downstream of H2O2 and pp38-like MAPK in the signal transduction pathway stimulating IPO. Conclusively, wounding decreased the amount of pp38-like MAPK, stimulated H2O2 production, and then induced IPO expression.
Collapse
Affiliation(s)
- Hsin-Hung Lin
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan; Department of Horticulture and Biotechnology, Chinese Culture University, Taipei, 11114, Taiwan
| | - Yu-Chi King
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Chi Li
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan
| | - Chih-Ching Lin
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
| | - Yu-Chi Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, 82444, Taiwan
| | - Jeng-Shane Lin
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan; Department of life sciences, National Chung Hsing University, Taichung, 40227, Taiwan.
| | - Shih-Tong Jeng
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, 10617, Taiwan.
| |
Collapse
|
21
|
Moreno NC, Garcia CCM, Munford V, Rocha CRR, Pelegrini AL, Corradi C, Sarasin A, Menck CFM. The key role of UVA-light induced oxidative stress in human Xeroderma Pigmentosum Variant cells. Free Radic Biol Med 2019; 131:432-442. [PMID: 30553972 DOI: 10.1016/j.freeradbiomed.2018.12.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 12/08/2018] [Accepted: 12/12/2018] [Indexed: 01/11/2023]
Abstract
The UVA component of sunlight induces DNA damage, which are basically responsible for skin cancer formation. Xeroderma Pigmentosum Variant (XP-V) patients are defective in the DNA polymerase pol eta that promotes translesion synthesis after sunlight-induced DNA damage, implying in a clinical phenotype of increased frequency of skin cancer. However, the role of UVA-light in the carcinogenesis of these patients is not completely understood. The goal of this work was to characterize UVA-induced DNA damage and the consequences to XP-V cells, compared to complemented cells. DNA damage were induced in both cells by UVA, but lesion removal was particularly affected in XP-V cells, possibly due to the oxidation of DNA repair proteins, as indicated by the increase of carbonylated proteins. Moreover, UVA irradiation promoted replication fork stalling and cell cycle arrest in the S-phase for XP-V cells. Interestingly, when cells were treated with the antioxidant N-acetylcysteine, all these deleterious effects were consistently reverted, revealing the role of oxidative stress in these processes. Together, these results strongly indicate the crucial role of oxidative stress in UVA-induced cytotoxicity and are of interest for the protection of XP-V patients.
Collapse
Affiliation(s)
- Natália Cestari Moreno
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | | | - Veridiana Munford
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | | | - Alessandra Luiza Pelegrini
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Camila Corradi
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Alain Sarasin
- Laboratory of Genetic Instability and Oncogenesis, UMR8200 CNRS, University Paris-Sud, Institut Gustave Roussy, Villejuif, France
| | | |
Collapse
|
22
|
Wang X, Dong X, Feng Y, Liu X, Wang J, Zhang Z, Li J, Zhao Y, Shi S, Tu P. H 2O 2 and NADPH oxidases involve in regulation of 2-(2-phenylethyl)chromones accumulation during salt stress in Aquilaria sinensis calli. Plant Sci 2018; 269:1-11. [PMID: 29606206 DOI: 10.1016/j.plantsci.2018.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/31/2017] [Accepted: 01/04/2018] [Indexed: 06/08/2023]
Abstract
2-(2-Phenylethyl)chromones are the main compounds responsible for the quality of agarwood, which is widely used in traditional medicines, incenses and perfumes. H2O2 and NADPH oxidases (also known as respiratory burst oxidase homologs, Rbohs) mediate diverse physiological and biochemical processes in environmental stress responses. However, little is known about the function of H2O2 and NADPH oxidases in 2-(2-phenylethyl)chromones accumulation. In this study, we found that salt stress induced a transient increase in content of H2O2 and 2-(2-phenylethyl)chromones accumulation in Aquilaria sinensis calli. Exogenous H2O2 remarkably decreased the production of 2-(2-phenylethyl)chromones, while dimethylthiourea (DMTU), a scavenger of H2O2, significantly increased 2-(2-phenylethyl)chromones accumulation in salt treated calli. Three new H2O2-generating genes, named AsRbohA-C, were isolated and characterized from A. sinensis. Salt stress also induced a transient increase in AsRbohA-C expression and NADPH oxidase activity. Furthermore, exogenous H2O2 increased AsRbohA-C expression and NADPH oxidase activity, while DMTU inhibited AsRbohA-C expression and NADPH oxidase activity under salt stress. Moreover, diphenylene iodonium (DPI), the inhibitor of NADPH oxidases, reduced AsRbohA-C expression and NADPH oxidase activity, but significantly induced 2-(2-phenylethyl)chromones accumulation during salt stress. These results clearly demonstrated the central role of H2O2 and NADPH oxidases in regulation of salt-induced 2-(2-phenylethyl)chromones accumulation in A. sinensis calli.
Collapse
Affiliation(s)
- Xiaohui Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xianjuan Dong
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Yingying Feng
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xiao Liu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Jinling Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Zhongxiu Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Jun Li
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Yunfang Zhao
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Shepo Shi
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China.
| | - Pengfei Tu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China.
| |
Collapse
|
23
|
Chen QM, Yu Y, Lin CM, Cui N, Zhao JY, Song TF, Fan HY. Glucohexaose-induced protein phosphatase 2C regulates cell redox status of cucumber seedling. J Biosci 2018; 43:117-126. [PMID: 29485120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Protein Phosphatase 2C (PP2C) is an important phosphatase-like protein in eukaryotic organisms that can negatively regulate protein kinase cascade abscisic acid (ABA) signal system through phosphorylation and carry out vital roles in various cell processes. The previous study indicated that the accumulation of reactive oxygen species (ROS) is a part of mechanism of glucohexaose-induced resistance in cucumber cotyledons, and CsPP2C80s might play a crucial role in processes related to ROS produce and signal transduction. To identify the mechanism of CsPP2C80s involved in glucohexaose and ABA signaling regulating cell redox status, the effects of glucohexaose and ROS inhibitor pretreatment on endogenous ABA content and ABA signaling genes expression levels of cucumber seedlings were analysed. These results suggest that cucumber CsPP2C80s are involved in ROS accumulation and ABA signal transduction pathway induced by glucohexaose, CsPP2C80s play a positive regulatory role in process of ABA combined with ABA receptors (PYLs) to activate SNF1-related protein kinases 2 (SnRK2s) and regulate NADPH oxidase to produce extracellular hydrogen peroxide (H2O2), providing unequivocal molecular evidence of PP2C-mediated ABA response mechanisms functioning in cell redox status induced by glucohexaose.
Collapse
Affiliation(s)
- Q M Chen
- College of Horticulture, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
24
|
Patel P, Kadur Narayanaswamy G, Kataria S, Baghel L. Involvement of nitric oxide in enhanced germination and seedling growth of magnetoprimed maize seeds. Plant Signal Behav 2017; 12:e1293217. [PMID: 28277969 PMCID: PMC5792134 DOI: 10.1080/15592324.2017.1293217] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Nitric oxide (NO) is a highly reactive gaseous free radical, which in plants was found to stimulate seed germination and ending of dormancy. Experiments were conducted to study the effect of NO inhibitors sodium tungstate (ST) and Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME), NADPH oxidase inhibitor diphenyleneiodonium (DPI) and NO donor sodium nitroprusside (SNP) on untreated and magnetoprimed maize (Zea mays var: GSF-2) seeds. Treatment of maize seeds with these inhibitors inhibited germination related parameters like seedling length, fresh weight, dry weight and vigour indices and α-amylase activity of maize seeds under laboratory conditions, whereas NO donor (SNP) promoted all these parameters. Among 3 different inhibitors used ST was most effective and showed an inhibition in seedling length of 67% and 71% at 1 mM concentration for untreated (UT) and magnetically treated (MT) seeds respectively. Data presented here indicate the involvement of nitric oxide in enhanced germination and seedling growth of magnetoprimed maize seeds. ROS are continuosly produced by the cells of germinating seeds and play a positive role in germination of magnetoprimed maize seeds. ROS inhibitor (DPI) inhibited seedling length by 34% and 40% for control and MT seeds respectively. α-amylase activity was also inhibited by all the 3 inhibitors used. It is concluded that NO inhibitors and ROS inhibitor inhibited magnetic field induced promotion of seedling parameters and α- amylase activity of maize seeds.
Collapse
Affiliation(s)
- Pinke Patel
- Magnetobiology Lab, School of Life Sciences, Devi Ahilya University, Khandwa Road, Indore, M.P., India
- CONTACT Pinke Patel Sunita Kataria ,Magnetobiology Lab, School of Life Sciences, Devi Ahilya University, Khandwa Road, Indore 452001, M.P., India
| | | | - Sunita Kataria
- Magnetobiology Lab, School of Life Sciences, Devi Ahilya University, Khandwa Road, Indore, M.P., India
- CONTACT Pinke Patel Sunita Kataria ,Magnetobiology Lab, School of Life Sciences, Devi Ahilya University, Khandwa Road, Indore 452001, M.P., India
| | - Lokesh Baghel
- Magnetobiology Lab, School of Life Sciences, Devi Ahilya University, Khandwa Road, Indore, M.P., India
| |
Collapse
|
25
|
Wang L, Nick P. Cold sensing in grapevine-Which signals are upstream of the microtubular "thermometer". Plant Cell Environ 2017; 40:2844-2857. [PMID: 28898434 DOI: 10.1111/pce.13066] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 08/23/2017] [Accepted: 08/28/2017] [Indexed: 05/09/2023]
Abstract
Plants can acquire freezing tolerance in response to cold but non-freezing temperatures. To efficiently activate this cold acclimation, low temperature has to be sensed and processed swiftly, a process that is linked with a transient elimination of microtubules. Here, we address cold-induced microtubules elimination in a grapevine cell line stably expressing a green fluorescent protein fusion of Arabidopsis TuB6, which allows to follow their response in vivo and to quantify this response by quantitative image analysis. We use time-course studies with several specific pharmacological inhibitors and activators to dissect the signalling events acting upstream of microtubules elimination. We find that microtubules disappear within 30 min after the onset of cold stress. We provide evidence for roles of calcium influx, membrane rigidification, and activation of NAD(P)H oxidase as factors in signal susception and amplification. We further conclude that a G-protein in concert with a phospholipase D convey the signal towards microtubules, whereas calmodulin seems to be not involved. Moreover, activation of jasmonate pathway in response to cold is required for an efficient microtubule response. We summarize our findings in a working model on a complex signalling hub at the membrane-cytoskeleton interphase that assembles the susception, perception and early transduction of cold signals.
Collapse
Affiliation(s)
- Lixin Wang
- Molecular Cell Biology, Botanical Institute, Karlsruhe Institute of Technology, Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
| | - Peter Nick
- Molecular Cell Biology, Botanical Institute, Karlsruhe Institute of Technology, Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
| |
Collapse
|
26
|
Tian Z, Zhang H, Dixon J, Traphagen N, Wyatt TA, Kharbanda K, Simet Chadwick S, Kolliputi N, Allen-Gipson DS. Cigarette Smoke Impairs A 2A Adenosine Receptor Mediated Wound Repair through Up-regulation of Duox-1 Expression. Sci Rep 2017; 7:44405. [PMID: 28337995 PMCID: PMC5364501 DOI: 10.1038/srep44405] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 01/31/2017] [Indexed: 02/03/2023] Open
Abstract
Cigarette smoke (CS) exposure and intrinsic factors such as the NADPH oxidases produce high levels of reactive oxygen species (ROS), ensuing inflammatory tissue injury. We previously demonstrated that CS-generated ROS, particularly hydrogen peroxide (H2O2), impaired adenosine stimulated wound repair. We hypothesized that CS exposure modulates expression of Dual oxidase 1 (Duox-1), a NADPH oxidases known to generate H2O2. To test this hypothesis, we used human bronchial epithelial cell line Nuli-1 and C57BL/6 mice. Cells were treated with 5% CS extract (CSE) for various periods of time, and mice were exposed to whole body CS for six weeks. Both CSE and CS treatment induced increased expression of Duox-1, and silencing of Doux-1 improved the rate of cell wound repair induced by CSE treatment. Nuli-1 cells pretreated with thapsigargin but not calcium ionophore exhibited increased Duox-1 mRNA expression. CSE treatment stimulated PKCα activation, which was effectively blocked by pretreatment with diphenylene iodonium, a NADPH oxidase inhibitor. Compared to control, lungs from CS-exposed mice showed a significant increase in PKCα activity and Duox-1 expression. Collectively, the data demonstrated that CS exposure upregulates expression of Duox-1 protein. This further leads to H2O2 production and PKCα activation, inhibiting A2AAR-stimulated wound repair.
Collapse
Affiliation(s)
- Zhi Tian
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa FL, USA
| | - Hui Zhang
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Jendayi Dixon
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa FL, USA
| | - Nicole Traphagen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa FL, USA
| | - Todd A. Wyatt
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Environmental, Agricultural, and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
- Research Service, Omaha-Western Iowa Veterans Affairs Medical Center, Omaha, NE, USA
| | - Kusum Kharbanda
- Research Service, Omaha-Western Iowa Veterans Affairs Medical Center, Omaha, NE, USA
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Nebraska Medical Center, NE, USA
| | - Samantha Simet Chadwick
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Narasaiah Kolliputi
- Division of Allergy and Immunology, Department of Internal Medicine, College of Medicine, University of South Florida, Tampa FL, USA
| | - Diane S. Allen-Gipson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa FL, USA
- Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
- Division of Allergy and Immunology, Department of Internal Medicine, College of Medicine, University of South Florida, Tampa FL, USA
| |
Collapse
|
27
|
Chandrakar V, Yadu B, Meena RK, Dubey A, Keshavkant S. Arsenic-induced genotoxic responses and their amelioration by diphenylene iodonium, 24-epibrassinolide and proline in Glycine max L. Plant Physiol Biochem 2017; 112:74-86. [PMID: 28049059 DOI: 10.1016/j.plaphy.2016.12.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 12/24/2016] [Accepted: 12/24/2016] [Indexed: 06/06/2023]
Abstract
Presence of the toxic metalloid, "arsenic (As)" is ubiquitous in the environment especially in the soil and water. Its excess availability in the soil retards growth and metabolism of plants via (a) slowing down the cell division/elongation, (b) overproduction of reactive oxygen species (ROS), (c) modulation of antioxidant enzymes, and (d) alteration of DNA profile/genomic template stability (GTS). In the current study, diphenylene iodonium (DPI), 24-epibrassinolide (EBL) and proline (Pro) were used to analyze their roles in eliminating the adverse effects of As. Glycine max L. (variety JS 335) seeds were subjected to As (75 μM, Sodium arsenite was used as source of As), and in combination with DPI (10 μM), EBL (0.5 μM) or Pro (10 mM), for five consecutive days, and effects of these treatment combinations were analyzed on germination percentage, biomass, membrane stability, GTS and expressions of defensive genes. In addition, the levels of As, ROS, malondialdehyde, DNA content, oxidation, fragmentation, polymorphism, DNase activity, endogenous Pro and pyrroline-5-carboxylate synthetase activity were evaluated. The results indicated that the treatments of DPI, EBL or Pro are capable to alleviate detrimental effects of As, gauged from above variables, but with different magnitudes. Apropos As-stress mitigation, Pro was found to be the most effective under the confines of the study protocol. This study certainly provides new ideas for intensifying studies to unravel elusive central mechanism of amelioration involving use of DPI, EBL or Pro in plants with confirmed As-toxicity.
Collapse
Affiliation(s)
- Vibhuti Chandrakar
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India
| | - Bhumika Yadu
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India
| | | | - Amit Dubey
- Central Laboratory Facility, Chhattisgarh Council of Science and Technology, Raipur 492 010, India
| | - S Keshavkant
- School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur 492 010, India.
| |
Collapse
|
28
|
Peng JJ, Liu B, Xu JY, Peng J, Luo XJ. NADPH oxidase: its potential role in promotion of pulmonary arterial hypertension. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:331-338. [PMID: 28190244 DOI: 10.1007/s00210-017-1359-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 02/03/2017] [Indexed: 12/27/2022]
Abstract
NADPH oxidases (NOXs) are a group of enzymes for superoxide anion (O2·- ) generation through transferring electrons from NADPH to molecular oxygen, which is rapidly converted into hydrogen peroxide (H2O2). There are seven members in NOX family, including NOX1 to NOX5, dual oxidase1, and dual oxidase 2. Recent studies have demonstrated that NOX subtypes may have different functions in different types of pulmonary arterial hypertension (PAH). The NOX-derived reactive oxygen species (ROS) are key factors that are involved in promoting the processes of pulmonary vascular remodeling, such as endothelial dysfunction, proliferation of pulmonary arterial smooth muscle cells (PASMCs), and cellular trans-differentiation, which are the basic pathologic characteristics of PAH. Inhibition of NOX shows beneficial effect on prevention of PAH development. Thus, NOX might be a potential target for PAH therapy. The main purpose of this review is to summarize recent findings on the role of NOX, particularly the NOX subtypes, in promotion of PAH development and to list recent progress regarding the NOX-based intervention for PAH.
Collapse
Affiliation(s)
- Jing-Jie Peng
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Bin Liu
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Jin-Yun Xu
- Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha, 410013, China
| | - Jun Peng
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China.
- Hunan Provincial Key Laboratory of Cardiovascular Research, School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China.
| | - Xiu-Ju Luo
- Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha, 410013, China.
| |
Collapse
|
29
|
Li J, Cao L, Staiger CJ. Capping Protein Modulates Actin Remodeling in Response to Reactive Oxygen Species during Plant Innate Immunity. Plant Physiol 2017; 173:1125-1136. [PMID: 27909046 PMCID: PMC5291016 DOI: 10.1104/pp.16.00992] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 11/30/2016] [Indexed: 05/06/2023]
Abstract
Plants perceive microbe-associated molecular patterns and damage-associated molecular patterns to activate innate immune signaling events, such as bursts of reactive oxygen species (ROS). The actin cytoskeleton remodels during the first 5 min of innate immune signaling in Arabidopsis (Arabidopsis thaliana) epidermal cells; however, the immune signals that impinge on actin cytoskeleton and its response regulators remain largely unknown. Here, we demonstrate that rapid actin remodeling upon elicitation with diverse microbe-associated molecular patterns and damage-associated molecular patterns represent a conserved plant immune response. Actin remodeling requires ROS generated by the defense-associated NADPH oxidase, RBOHD. Moreover, perception of flg22 by its cognate receptor complex triggers actin remodeling through the activation of RBOHD-dependent ROS production. Our genetic studies reveal that the ubiquitous heterodimeric capping protein transduces ROS signaling to the actin cytoskeleton during innate immunity. Additionally, we uncover a negative feedback loop between actin remodeling and flg22-induced ROS production.
Collapse
Affiliation(s)
- Jiejie Li
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.L., L.C., C.J.S.); and
- The Bindley Bioscience Center and Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907 (C.J.S.)
| | - Lingyan Cao
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.L., L.C., C.J.S.); and
- The Bindley Bioscience Center and Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907 (C.J.S.)
| | - Christopher J Staiger
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.L., L.C., C.J.S.); and
- The Bindley Bioscience Center and Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907 (C.J.S.)
| |
Collapse
|
30
|
Lee DJ, Choi HJ, Moon ME, Chi YT, Ji KY, Choi D. Superoxide serves as a putative signal molecule for plant cell division: overexpression of CaRLK1 promotes the plant cell cycle via accumulation of O 2- and decrease in H 2 O 2. Physiol Plant 2017; 159:228-243. [PMID: 27528370 DOI: 10.1111/ppl.12487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 05/26/2023]
Abstract
Reactive oxygen species (ROS) exert both positive and negative effects on plant growth and development and therefore receive a great deal of attention in current research. A hot pepper, Capsicum annuum receptor-like kinase 1 (CaRLK1) was ectopically expressed in Nicotiana tabacum BY-2 cell and Nicotiana benthamiana plants. This ectopic expression of CaRLK1 enhanced cell division and proliferation in both heterologous systems. Apparently, CaRLK1 is involved in controlling the cell cycle, possibly by inducing expressions of cyclin B1, cyclin D3, cyclin-dependent protein kinase 3, condensin complex subunit 2 and anaphase-promoting complex subunit 11 genes. CaRLK1 overexpression also increased transcript accumulation of NADPH oxidase genes, generation of O2- and catalase (CAT) activity/protein levels. In parallel, it decreased cellular H2 O2 levels and cell size. Treatment with Tiron or diphenyleneiodonium (DPI) both decreased the cell division rate and O2- concentrations, but increased cellular H2 O2 levels. Tobacco BY-2 cells overexpressing CaRLK1 were more sensitive to amino-1,2,4-triazole (3-AT), a CAT inhibitor, than control cells, suggesting that the increased H2 O2 levels may not function as a signal for cell division and proliferation. Overexpression of CaRLK1 stimulated progression of the cell cycle from G0 /G1 phase into the S phase. It is concluded that the CaRLK1 protein plays a pivotal role in controlling the level of O2- as signaling molecule which promotes cell division, concomitant with a reduction in H2 O2 by the induction of CAT activity/protein.
Collapse
Affiliation(s)
- Dong Ju Lee
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, South Korea
| | - Hyun Jun Choi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, South Korea
| | - Mid-Eum Moon
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and life Sciences, College of Agriculture & Life Sciences, Seoul National University, Seoul, South Korea
| | - Youn-Tae Chi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, South Korea
| | - Kon-Young Ji
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, South Korea
| | - Doil Choi
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute of Agriculture and life Sciences, College of Agriculture & Life Sciences, Seoul National University, Seoul, South Korea
- Seed Biotechnology Institute, Institute of Green Bio Science and Technology, Pyeongchang Campus, Seoul National University, Pyeongchang, South Korea
| |
Collapse
|
31
|
Eggenberger K, Sanyal P, Hundt S, Wadhwani P, Ulrich AS, Nick P. Challenge Integrity: The Cell-Penetrating Peptide BP100 Interferes with the Auxin-Actin Oscillator. Plant Cell Physiol 2017; 58:71-85. [PMID: 28173585 DOI: 10.1093/pcp/pcw161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 09/12/2016] [Indexed: 05/12/2023]
Abstract
Actin filaments are essential for the integrity of the cell membrane. In addition to this structural role, actin can modulate signaling by altering polar auxin flow. On the other hand, the organization of actin filaments is modulated by auxin constituting a self-referring signaling hub. Although the function of this auxin–actin oscillator is not clear, there is evidence for a functional link with stress signaling activated by the NADPH oxidase Respiratory burst oxidase Homolog (RboH). In the current work, we used the cell-penetrating peptide BP100 to induce a mild and transient perturbation of membrane integrity. We followed the response of actin to the BP100 uptake in a green fluorescent protein (GFP)-tagged actin marker line of tobacco Bright Yellow 2 (BY-2) cells by spinning disc confocal microscopy. We observed that BP100 enters in a stepwise manner and reduces the extent of actin remodeling. This actin ‘freezing’ can be rescued by the natural auxin IAA, and mimicked by the auxin-efflux inhibitor 1-napthylphthalamic acid (NPA). We further tested the role of the membrane-localized NADPH oxidase RboH using the specific inhibitor diphenyl iodonium (DPI), and found that DPI acts antagonistically to BP100, although DPI alone can induce a similar actin ‘freezing’ as well. We propose a working model, where the mild violation of membrane integrity by BP100 stimulates RboH, and the resulting elevated levels of reactive oxygen species interfere with actin dynamicity. The mitigating effect of auxin is explained by competition of auxin- and RboH-triggered signaling for superoxide anions. This self-referring auxin–actin–RboH hub might be essential for integrity sensing.
Collapse
Affiliation(s)
- Kai Eggenberger
- Botanical Institute and DFG-Center of Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Kaiserstr, Karlsruhe, Germany
| | - Papia Sanyal
- Institute of Biological Interfaces (IBG-2) and DFG-Center of Functional Nanostructures (CFN), Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 6, Karlsruhe, Germany
| | - Svenja Hundt
- Botanical Institute and DFG-Center of Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Kaiserstr, Karlsruhe, Germany
| | - Parvesh Wadhwani
- Institute of Biological Interfaces (IBG-2) and DFG-Center of Functional Nanostructures (CFN), Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 6, Karlsruhe, Germany
| | - Anne S Ulrich
- Institute of Biological Interfaces (IBG-2) and DFG-Center of Functional Nanostructures (CFN), Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 6, Karlsruhe, Germany
| | - Peter Nick
- Botanical Institute and DFG-Center of Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Kaiserstr, Karlsruhe, Germany
| |
Collapse
|
32
|
Xia Y, Zhou X, Wang G, Zhang B, Xu G, Ai L. Induction of antroquinonol production by addition of hydrogen peroxide in the fermentation of Antrodia camphorata S-29. J Sci Food Agric 2017; 97:595-599. [PMID: 27098319 DOI: 10.1002/jsfa.7770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/17/2016] [Accepted: 04/11/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Antroquinonol have significantly anti-tumour effects on various cancer cells. There is still lack of reports on regulation of environmental factors on antroquinonol production by Antrodia camphorata. RESULTS An effective submerged fermentation method was employed to induce antroquinonol with adding H2 O2 . The production of antroquinonol was 57.81 mg L-1 after fermentation for 10 days when adding 25 mmol L-1 H2 O2 at day 4 of the fermentation process. Then, antroquinonol was further increased to 80.10 mg L-1 with cell productivity of 14.94 mg g-1 dry mycelium when the feeding rate of H2 O2 was adjusted to 0.2 mmol L-1 h-1 in the 7 L fermentation bioreactor. After inhibiting the generation of reactive oxygen species with the inhibitor diphenyleneiodoium, the synthesis of antroquinonol from A. camphorata was significantly reduced, and the yield was only 3.3 mg L-1 . CONCLUSION The results demonstrated that addition of H2 O2 was a very effective strategy to induce and regulate the synthesis of antroquinonol in submerged fermentation. Reactive oxygen species generated by H2 O2 during fermentation caused oxidative stress, which induced the synthesis of antroquinonol and other chemical compounds. Moreover, it is very beneficial process to improve production and diversity of the active compounds during liquid fermentation of A. camphorata mycelium. © 2016 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yongjun Xia
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xuan Zhou
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Guangqiang Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Bobo Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Ganrong Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Lianzhong Ai
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| |
Collapse
|
33
|
Tamás L, Mistrík I, Zelinová V. Cadmium activates both diphenyleneiodonium- and rotenone-sensitive superoxide production in barley root tips. Planta 2016; 244:1277-1287. [PMID: 27534965 DOI: 10.1007/s00425-016-2587-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/11/2016] [Indexed: 06/06/2023]
Abstract
Mild Cd stress-activated diphenyleneiodonium-sensitive superoxide production is utilized in root morphogenic responses, while severe Cd stress-induced robust rotenone-sensitive superoxide generation may lead to cell and root death. In barley, even a few minute exposure of roots to Cd concentration higher than 10 µM evoked a strong superoxide generation in the root transition zone. This superoxide generation was strongly inhibited by the inhibition of mitochondrial electron flow into complex III in the presence of the mitochondrial complex I inhibitor rotenone. Similarly, the superoxide generation induced by antimycin A, an inhibitor of mitochondrial complex III, was considerably reduced by rotenone, suggesting the involvement of complex III also in the severe Cd stress-induced superoxide generation. This severe Cd stress-induced superoxide generation was followed by an extensive cell death in this part of the root tip, which similar to the superoxide generation, was eliminated by rotenone co-treatment. In turn, mild Cd stress-induced diphenyleneiodonium (DPI)-sensitive superoxide generation was observed only in the post-stressed roots, suggesting that it is not directly associated with Cd toxicity. Diphenyleneiodonium, an inhibitor of NADPH oxidase, markedly inhibited the mild Cd stress-induced radial expansion of root apex, indicating that enhanced DPI-sensitive superoxide production is required for rapid isotropic cell growth. Severe Cd stress, probably through the inhibition of complex III, caused a rapid and robust superoxide generation leading to cell and/or root death. By contrast, mild Cd stress did not evoke oxidative stress, and the enhanced DPI-sensitive superoxide generation is utilized in adaptive morphogenic responses.
Collapse
Affiliation(s)
- Ladislav Tamás
- Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84523, Bratislava, Slovak Republic.
| | - Igor Mistrík
- Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84523, Bratislava, Slovak Republic
| | - Veronika Zelinová
- Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84523, Bratislava, Slovak Republic
| |
Collapse
|
34
|
Schibler J, Tomanek-Chalkley AM, Reedy JL, Zhan F, Spitz DR, Schultz MK, Goel A. Mitochondrial-Targeted Decyl-Triphenylphosphonium Enhances 2-Deoxy-D-Glucose Mediated Oxidative Stress and Clonogenic Killing of Multiple Myeloma Cells. PLoS One 2016; 11:e0167323. [PMID: 27902770 PMCID: PMC5130279 DOI: 10.1371/journal.pone.0167323] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 11/11/2016] [Indexed: 12/16/2022] Open
Abstract
Therapeutic advances have markedly prolonged overall survival in multiple myeloma (MM) but the disease currently remains incurable. In a panel of MM cell lines (MM.1S, OPM-2, H929, and U266), using CD138 immunophenotyping, side population staining, and stem cell-related gene expression, we demonstrate the presence of stem-like tumor cells. Hypoxic culture conditions further increased CD138low stem-like cells with upregulated expression of OCT4 and NANOG. Compared to MM cells, these stem-like cells maintained lower steady-state pro-oxidant levels with increased uptake of the fluorescent deoxyglucose analog. In primary human MM samples, increased glycolytic gene expression correlated with poorer overall and event-free survival outcomes. Notably, stem-like cells showed increased mitochondrial mass, rhodamine 123 accumulation, and orthodox mitochondrial configuration while more condensed mitochondria were noted in the CD138high cells. Glycolytic inhibitor 2-deoxyglucose (2-DG) induced ER stress as detected by qPCR (BiP, ATF4) and immunoblotting (BiP, CHOP) and increased dihydroethidium probe oxidation both CD138low and CD138high cells. Treatment with a mitochondrial-targeting agent decyl-triphenylphosphonium (10-TPP) increased intracellular steady-state pro-oxidant levels in stem-like and mature MM cells. Furthermore, 10-TPP mediated increases in mitochondrial oxidant production were suppressed by ectopic expression of manganese superoxide dismutase. Relative to 2-DG or 10-TPP alone, 2-DG plus 10-TPP combination showed increased caspase 3 activation in MM cells with minimal toxicity to the normal hematopoietic progenitor cells. Notably, treatment with polyethylene glycol conjugated catalase significantly reduced 2-DG and/or 10-TPP-induced apoptosis of MM cells. Also, the combination of 2-DG with 10-TPP decreased clonogenic survival of MM cells. Taken together, this study provides a novel strategy of metabolic oxidative stress-induced cytotoxicity of MM cells via 2-DG and 10-TPP combination therapy.
Collapse
Affiliation(s)
- Jeanine Schibler
- Interdisciplinary Graduate Program in Molecular and Cellular Biology, University of Iowa, Iowa City, IA, United States of America
| | - Ann M. Tomanek-Chalkley
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, United States of America
| | - Jessica L. Reedy
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, United States of America
| | - Fenghuang Zhan
- Interdisciplinary Graduate Program in Molecular and Cellular Biology, University of Iowa, Iowa City, IA, United States of America
- Department of Internal Medicine, University of Iowa, Iowa City, IA, United States of America
| | - Douglas R. Spitz
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, United States of America
| | - Michael K. Schultz
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, United States of America
- Department of Radiology, University of Iowa, Iowa City, IA, United States of America
| | - Apollina Goel
- Interdisciplinary Graduate Program in Molecular and Cellular Biology, University of Iowa, Iowa City, IA, United States of America
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA, United States of America
- * E-mail:
| |
Collapse
|
35
|
Mira MM, Hill RD, Stasolla C. Phytoglobins Improve Hypoxic Root Growth by Alleviating Apical Meristem Cell Death. Plant Physiol 2016; 172:2044-2056. [PMID: 27702845 PMCID: PMC5100795 DOI: 10.1104/pp.16.01150] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 09/29/2016] [Indexed: 05/18/2023]
Abstract
Hypoxic root growth in maize (Zea mays) is influenced by the expression of phytoglobins (ZmPgbs). Relative to the wild type, suppression of ZmPgb1.1 or ZmPgb1.2 inhibits the growth of roots exposed to 4% oxygen, causing structural abnormalities in the root apical meristems. These effects were accompanied by increasing levels of reactive oxygen species (ROS), possibly through the transcriptional induction of four Respiratory Burst Oxidase Homologs TUNEL-positive nuclei in meristematic cells indicated the involvement of programmed cell death (PCD) in the process. These cells also accumulated nitric oxide and stained heavily for ethylene biosynthetic transcripts. A sharp increase in the expression level of several 1-aminocyclopropane synthase (ZmAcs2, ZmAcs6, and ZmAcs7), 1-aminocyclopropane oxidase (Aco15, Aco20, Aco31, and Aco35), and ethylene-responsive (ZmErf2 and ZmEbf1) genes was observed in hypoxic ZmPgb-suppressing roots, which overproduced ethylene. Inhibiting ROS synthesis with diphenyleneiodonium or ethylene perception with 1-methylcyclopropene suppressed PCD, increased BAX inhibitor-1, an effective attenuator of the death programs in eukaryotes, and restored root growth. Hypoxic roots overexpressing ZmPgbs had the lowest level of ethylene and showed a reduction in ROS staining and TUNEL-positive nuclei in the meristematic cells. These roots retained functional meristems and exhibited the highest growth performance when subjected to hypoxic conditions. Collectively, these results suggest a novel function of Pgbs in protecting root apical meristems from hypoxia-induced PCD through mechanisms initiated by nitric oxide and mediated by ethylene via ROS.
Collapse
Affiliation(s)
- Mohamed M Mira
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| |
Collapse
|
36
|
Krieger G, Shkolnik D, Miller G, Fromm H. Reactive Oxygen Species Tune Root Tropic Responses. Plant Physiol 2016; 172:1209-1220. [PMID: 27535793 PMCID: PMC5047083 DOI: 10.1104/pp.16.00660] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/15/2016] [Indexed: 05/03/2023]
Abstract
The default growth pattern of primary roots of land plants is directed by gravity. However, roots possess the ability to sense and respond directionally to other chemical and physical stimuli, separately and in combination. Therefore, these root tropic responses must be antagonistic to gravitropism. The role of reactive oxygen species (ROS) in gravitropism of maize and Arabidopsis (Arabidopsis thaliana) roots has been previously described. However, which cellular signals underlie the integration of the different environmental stimuli, which lead to an appropriate root tropic response, is currently unknown. In gravity-responding roots, we observed, by applying the ROS-sensitive fluorescent dye dihydrorhodamine-123 and confocal microscopy, a transient asymmetric ROS distribution, higher at the concave side of the root. The asymmetry, detected at the distal elongation zone, was built in the first 2 h of the gravitropic response and dissipated after another 2 h. In contrast, hydrotropically responding roots show no transient asymmetric distribution of ROS Decreasing ROS levels by applying the antioxidant ascorbate, or the ROS-generation inhibitor diphenylene iodonium attenuated gravitropism while enhancing hydrotropism. Arabidopsis mutants deficient in Ascorbate Peroxidase 1 showed attenuated hydrotropic root bending. Mutants of the root-expressed NADPH oxidase RBOH C, but not rbohD, showed enhanced hydrotropism and less ROS in their roots apices (tested in tissue extracts with Amplex Red). Finally, hydrostimulation prior to gravistimulation attenuated the gravistimulated asymmetric ROS and auxin signals that are required for gravity-directed curvature. We suggest that ROS, presumably H2O2, function in tuning root tropic responses by promoting gravitropism and negatively regulating hydrotropism.
Collapse
Affiliation(s)
- Gat Krieger
- Department of Molecular Biology and Ecology of Plants, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel (G.K., D.S., H.F.); andMina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel (G.M.)
| | - Doron Shkolnik
- Department of Molecular Biology and Ecology of Plants, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel (G.K., D.S., H.F.); andMina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel (G.M.)
| | - Gad Miller
- Department of Molecular Biology and Ecology of Plants, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel (G.K., D.S., H.F.); andMina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel (G.M.)
| | - Hillel Fromm
- Department of Molecular Biology and Ecology of Plants, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel (G.K., D.S., H.F.); andMina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel (G.M.)
| |
Collapse
|
37
|
Shinde S, Villamor JG, Lin W, Sharma S, Verslues PE. Proline Coordination with Fatty Acid Synthesis and Redox Metabolism of Chloroplast and Mitochondria. Plant Physiol 2016; 172:1074-1088. [PMID: 27512016 PMCID: PMC5047111 DOI: 10.1104/pp.16.01097] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 08/05/2016] [Indexed: 05/20/2023]
Abstract
Proline (Pro) accumulation is one of the most prominent changes in plant metabolism during drought and low water potential; however, the regulation and function of Pro metabolism remain unclear. We used a combination of forward genetic screening based on a Proline Dehydrogenase1 (PDH1) promoter-luciferase reporter (PDH1pro:LUC2) and RNA sequencing of the Pro synthesis mutant p5cs1-4 to identify multiple loci affecting Pro accumulation in Arabidopsis (Arabidopsis thaliana). Two mutants having high PDH1pro:LUC2 expression and increased Pro accumulation at low water potential were found to be alleles of Cytochrome P450, Family 86, Subfamily A, Polypeptide2 (CYP86A2) and Long Chain Acyl Synthetase2 (LACS2), which catalyze two successive steps in very-long-chain fatty acid (VLCFA) synthesis. Reverse genetic experiments found additional VLCFA and lipid metabolism-related mutants with increased Pro accumulation. Altered cellular redox status is a key factor in the coordination of Pro and VLCFA metabolism. The NADPH oxidase inhibitor diphenyleneiodonium (DPI) induced high levels of Pro accumulation and strongly repressed PDH1pro:LUC2 expression. cyp86a2 and lacs2 mutants were hypersensitive to diphenyleneiodonium but could be reverted to wild-type Pro and PDH1pro:LUC2 expression by reactive oxygen species scavengers. The coordination of Pro and redox metabolism also was indicated by the altered expression of chloroplast and mitochondria electron transport genes in p5cs1-4 These results show that Pro metabolism is both influenced by and influences cellular redox status via previously unknown coordination with several metabolic pathways. In particular, Pro and VLCFA synthesis share dual roles to help buffer cellular redox status while producing products useful for stress resistance, namely the compatible solute Pro and cuticle lipids.
Collapse
Affiliation(s)
- Suhas Shinde
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| | - Joji Grace Villamor
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| | - Wendar Lin
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| | - Sandeep Sharma
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| | - Paul E Verslues
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
| |
Collapse
|
38
|
Yan JJ, Xie B, Zhang L, Li SJ, van Peer AF, Wu TJ, Chen BZ, Xie BG. Small GTPases and Stress Responses of vvran1 in the Straw Mushroom Volvariella volvacea. Int J Mol Sci 2016; 17:ijms17091527. [PMID: 27626406 PMCID: PMC5037802 DOI: 10.3390/ijms17091527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 12/11/2022] Open
Abstract
Small GTPases play important roles in the growth, development and environmental responses of eukaryotes. Based on the genomic sequence of the straw mushroom Volvariella volvacea, 44 small GTPases were identified. A clustering analysis using human small GTPases as the references revealed that V. volvacea small GTPases can be grouped into five families: nine are in the Ras family, 10 are in the Rho family, 15 are in the Rab family, one is in the Ran family and nine are in the Arf family. The transcription of vvran1 was up-regulated upon hydrogen peroxide (H2O2) stress, and could be repressed by diphenyleneiodonium chloride (DPI), a NADPH oxidase-specific inhibitor. The number of vvran1 transcripts also increased upon cold stress. Diphenyleneiodonium chloride, but not the superoxide dismutase (SOD) inhibitor diethy dithiocarbamate (DDC), could suppress the up-regulation of vvran1 gene expression to cold stress. These results combined with the high correlations between gene expression and superoxide anion (O2−) generation indicated that vvran1 could be one of the candidate genes in the downstream of O2− mediated pathways that are generated by NADPH oxidase under low temperature and oxidative stresses.
Collapse
Affiliation(s)
- Jun-Jie Yan
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Bin Xie
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Lei Zhang
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Shao-Jie Li
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, China.
| | - Arend F van Peer
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Ta-Ju Wu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, China.
| | - Bing-Zhi Chen
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Bao-Gui Xie
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| |
Collapse
|
39
|
Zhu C, Yang N, Guo Z, Qian M, Gan L. An ethylene and ROS-dependent pathway is involved in low ammonium-induced root hair elongation in Arabidopsis seedlings. Plant Physiol Biochem 2016; 105:37-44. [PMID: 27074220 DOI: 10.1016/j.plaphy.2016.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/29/2016] [Accepted: 04/01/2016] [Indexed: 05/08/2023]
Abstract
Root hairs are plastic in response to nutrient supply, but relatively little is known about their development under low ammonium (NH4(+)) conditions. This study showed that reducing NH4(+) for 3 days in wild-type Arabidopsis seedlings resulted in drastic elongation of root hairs. To investigate the possible mediation of ethylene and auxin in this process, seedlings were treated with 2,3,5-triiodobenzoic acid (TIBA, auxin transport inhibitor), 1-naphthylphthalamic acid (NPA, auxin transport inhibitor), p-chlorophenoxy isobutyric acid (PCIB, auxin action inhibitor), aminoethoxyvinylglycine (AVG, chemical inhibitor of ethylene biosynthesis), or silver ions (Ag(+), ethylene perception antagonist) under low NH4(+) conditions. Our results showed that TIBA, NPA and PCIB did not inhibit root hair elongation under low NH4(+) conditions, while AVG and Ag(+) completely inhibited low NH4(+)-induced root hair elongation. This suggested that low NH4(+)-induced root hair elongation was dependent on the ethylene pathway, but not the auxin pathway. Further genetic studies revealed that root hair elongation in auxin-insensitive mutants was sensitive to low NH4(+) treatment, but elongation was less sensitive in ethylene-insensitive mutants than wild-type plants. In addition, low NH4(+)-induced root hair elongation was accompanied by reactive oxygen species (ROS) accumulation. Diphenylene iodonium (DPI, NADPH oxidase inhibitor) and dimethylthiourea (DMTU, ROS scavenger) inhibited low NH4(+)-induced root hair elongation, suggesting that ROS were involved in this process. Moreover, ethylene acted together with ROS to modulate root hair elongation under low NH4(+) conditions. These results demonstrate that a signaling pathway involving ethylene and ROS participates in regulation of root hair elongation when Arabidopsis seedlings are subjected to low NH4(+) conditions.
Collapse
Affiliation(s)
- Changhua Zhu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Na Yang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhengfei Guo
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Meng Qian
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lijun Gan
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| |
Collapse
|
40
|
Graças JP, Ruiz-Romero R, Figueiredo LD, Mattiello L, Peres LEP, Vitorello VA. Root growth restraint can be an acclimatory response to low pH and is associated with reduced cell mortality: a possible role of class III peroxidases and NADPH oxidases. Plant Biol (Stuttg) 2016; 18:658-68. [PMID: 26891589 DOI: 10.1111/plb.12443] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 02/15/2016] [Indexed: 05/15/2023]
Abstract
Low pH (<5.0) can significantly decrease root growth but whether this is a direct effect of H(+) or an active plant response is examined here. Tomato (Solanum lycopersicum cv Micro-Tom) roots were exposed directly or gradually to low pH through step-wise changes in pH over periods ranging from 4 to 24 h. Roots exposed gradually to pH 4.5 grew even less than those exposed directly, indicating a plant-coordinated response. Direct exposure to pH 4.0 suppressed root growth and caused high cell mortality, in contrast to roots exposed gradually, in which growth remained inhibited but cell viability was maintained. Total class III peroxidase activity increased significantly in all low pH treatments, but was not correlated with the observed differential responses. Use of the enzyme inhibitors salicylhydroxamic acid (SHAM) or diphenyleneiodonium chloride (DPI) suggest that peroxidase and, to a lesser extent, NADPH oxidase were required to prevent or reduce injury in all low pH treatments. However, a role for other enzymes, such as the alternative oxidase is also possible. The results with SHAM, but not DPI, were confirmed in tobacco BY-2 cells. Our results indicate that root growth inhibition from low pH can be part of an active plant response, and suggest that peroxidases may have a critical early role in reducing loss of cell viability and in the observed root growth constraint.
Collapse
Affiliation(s)
- J P Graças
- Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, Brazil
| | - R Ruiz-Romero
- Centro de Energia Nuclear na Agricultura, University of São Paulo, Piracicaba, Brazil
| | - L D Figueiredo
- Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, Brazil
| | - L Mattiello
- Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, Brazil
| | - L E P Peres
- Escola Superior de Agricultura 'Luiz de Queiroz', University of São Paulo, Piracicaba, Brazil
| | - V A Vitorello
- Centro de Energia Nuclear na Agricultura, University of São Paulo, Piracicaba, Brazil
| |
Collapse
|
41
|
Evans MJ, Choi WG, Gilroy S, Morris RJ. A ROS-Assisted Calcium Wave Dependent on the AtRBOHD NADPH Oxidase and TPC1 Cation Channel Propagates the Systemic Response to Salt Stress. Plant Physiol 2016; 171:1771-84. [PMID: 27261066 PMCID: PMC4936552 DOI: 10.1104/pp.16.00215] [Citation(s) in RCA: 158] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 06/02/2016] [Indexed: 05/17/2023]
Abstract
Plants exhibit rapid, systemic signaling systems that allow them to coordinate physiological and developmental responses throughout the plant body, even to highly localized and quickly changing environmental stresses. The propagation of these signals is thought to include processes ranging from electrical and hydraulic networks to waves of reactive oxygen species (ROS) and cytoplasmic Ca(2+) traveling throughout the plant. For the Ca(2+) wave system, the involvement of the vacuolar ion channel TWO PORE CHANNEL1 (TPC1) has been reported. However, the precise role of this channel and the mechanism of cell-to-cell propagation of the wave have remained largely undefined. Here, we use the fire-diffuse-fire model to analyze the behavior of a Ca(2+) wave originating from Ca(2+) release involving the TPC1 channel in Arabidopsis (Arabidopsis thaliana). We conclude that a Ca(2+) diffusion-dominated calcium-induced calcium-release mechanism is insufficient to explain the observed wave transmission speeds. The addition of a ROS-triggered element, however, is able to quantitatively reproduce the observed transmission characteristics. The treatment of roots with the ROS scavenger ascorbate and the NADPH oxidase inhibitor diphenyliodonium and analysis of Ca(2+) wave propagation in the Arabidopsis respiratory burst oxidase homolog D (AtrbohD) knockout background all led to reductions in Ca(2+) wave transmission speeds consistent with this model. Furthermore, imaging of extracellular ROS production revealed a systemic spread of ROS release that is dependent on both AtRBOHD and TPC1 These results suggest that, in the root, plant systemic signaling is supported by a ROS-assisted calcium-induced calcium-release mechanism intimately involving ROS production by AtRBOHD and Ca(2+) release dependent on the vacuolar channel TPC1.
Collapse
Affiliation(s)
- Matthew J Evans
- Computational and Systems Biology and Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom (M.J.E., R.J.M.); andDepartment of Botany, University of Wisconsin, Madison, Wisconsin 53706 (W.-G.C., S.G.)
| | - Won-Gyu Choi
- Computational and Systems Biology and Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom (M.J.E., R.J.M.); andDepartment of Botany, University of Wisconsin, Madison, Wisconsin 53706 (W.-G.C., S.G.)
| | - Simon Gilroy
- Computational and Systems Biology and Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom (M.J.E., R.J.M.); andDepartment of Botany, University of Wisconsin, Madison, Wisconsin 53706 (W.-G.C., S.G.)
| | - Richard J Morris
- Computational and Systems Biology and Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom (M.J.E., R.J.M.); andDepartment of Botany, University of Wisconsin, Madison, Wisconsin 53706 (W.-G.C., S.G.)
| |
Collapse
|
42
|
Kai K, Kasa S, Sakamoto M, Aoki N, Watabe G, Yuasa T, Iwaya-Inoue M, Ishibashi Y. Role of reactive oxygen species produced by NADPH oxidase in gibberellin biosynthesis during barley seed germination. Plant Signal Behav 2016; 11:e1180492. [PMID: 27110861 PMCID: PMC4977456 DOI: 10.1080/15592324.2016.1180492] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
NADPH oxidase catalyzes the production of the superoxide anion (O2(-)), a reactive oxygen species (ROS), and regulates the germination of barley (Hordeum vulgare L.). Diphenyleneiodonium (DPI) chloride, an NADPH oxidase inhibitor, delayed barley germination, and exogenous H2O2 (an ROS) partially rescued it. Six enzymes, ent-copalyl diphosphate synthase (CPS), ent-kaurene synthase (KS), ent-kaurene oxidase (KO), ent-kaurenoic acid oxidase (KAO), GA20-oxidase (GA20ox) and GA3-oxidase (GA3ox), catalyze the transformation of trans-geranylgeranyl diphosphate to active gibberellin, which promotes germination. Exogenous H2O2 promoted the expressions of HvKAO1 and HvGA3ox1 in barley embryos. These results suggest that ROS produced by NADPH oxidase are involved in gibberellin biosynthesis through the regulation of HvKAO1 and HvGA3ox1.
Collapse
Affiliation(s)
- Kyohei Kai
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Shinsuke Kasa
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Masatsugu Sakamoto
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Nozomi Aoki
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Gaku Watabe
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Takashi Yuasa
- Department of Agricultural and Environmental Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Mari Iwaya-Inoue
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
| | - Yushi Ishibashi
- Crop Science Laboratory, Faculty of Agriculture, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
- Yushi Ishibashi
| |
Collapse
|
43
|
Szilagyi JT, Mishin V, Heck DE, Jan YH, Aleksunes LM, Richardson JR, Heindel ND, Laskin DL, Laskin JD. Selective Targeting of Heme Protein in Cytochrome P450 and Nitric Oxide Synthase by Diphenyleneiodonium. Toxicol Sci 2016; 151:150-9. [PMID: 26880746 PMCID: PMC4914801 DOI: 10.1093/toxsci/kfw031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cytochrome P450 (CYP) enzymes mediate mixed-function oxidation reactions important in drug metabolism. The aromatic heterocyclic cation, diphenyleneiodonium (DPI), binds flavin in cytochrome P450 reductase and inhibits CYP-mediated activity. DPI also inhibits CYP by directly interacting with heme. Herein, we report that DPI effectively inhibits a number of CYP-related monooxygenase reactions including NADPH oxidase, a microsomal enzyme activity that generates hydrogen peroxide in the absence of metabolizing substrates. Inhibition of monooxygenase by DPI was time and concentration dependent with IC50's ranging from 0.06 to 1.9 μM. Higher (4.6-23.9 μM), but not lower (0.06-1.9 μM), concentrations of DPI inhibited electron flow via cytochrome P450 reductase, as measured by its ability to reduce cytochrome c and mediate quinone redox cycling. Similar results were observed with inducible nitric oxide synthase (iNOS), an enzyme containing a C-terminal reductase domain homologous to cytochrome P450 reductase that mediates reduction of cytochrome c, and an N-terminal heme-thiolate oxygenase domain mediating nitric oxide production. Significantly greater concentrations of DPI were required to inhibit cytochrome c reduction by iNOS (IC50 = 3.5 µM) than nitric oxide production (IC50 = 0.16 µM). Difference spectra of liver microsomes, recombinant CYPs, and iNOS demonstrated that DPI altered heme-carbon monoxide interactions. In the presence of NADPH, DPI treatment of microsomes and iNOS yielded a type II spectral shift. These data indicate that DPI interacts with both flavin and heme in CYPs and iNOS. Increased sensitivity for inhibition of CYP-mediated metabolism and nitric oxide production by iNOS indicates that DPI targets heme moieties within the enzymes.
Collapse
Affiliation(s)
- John T Szilagyi
- *Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854
| | - Vladimir Mishin
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854
| | - Diane E Heck
- Department of Environmental Health Science, New York Medical College, Valhalla, NY 10595
| | - Yi-Hua Jan
- *Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854
| | - Lauren M Aleksunes
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854
| | - Jason R Richardson
- Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH 44272
| | - Ned D Heindel
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015
| | - Debra L Laskin
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ 08854
| | - Jeffrey D Laskin
- *Department of Environmental and Occupational Health, Rutgers University School of Public Health, Piscataway, NJ 08854
| |
Collapse
|
44
|
Li Q, Wang Z, Zhao Y, Zhang X, Zhang S, Bo L, Wang Y, Ding Y, An L. Putrescine protects hulless barley from damage due to UV-B stress via H2S- and H2O2-mediated signaling pathways. Plant Cell Rep 2016; 35:1155-68. [PMID: 26910861 DOI: 10.1007/s00299-016-1952-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 02/05/2016] [Indexed: 05/23/2023]
Abstract
In hulless barley, H 2 S mediated increases in H 2 O 2 induced by putrescine, and their interaction enhanced tolerance to UV-B by maintaining redox homeostasis and promoting the accumulation of UV-absorbing compounds. This study investigated the possible relationship between putrescence (Put), hydrogen sulfide (H2S) and hydrogen peroxide (H2O2) as well as the underlying mechanism of their interaction in reducing UV-B induced damage. UV-B radiation increased electrolyte leakage (EL) and the levels of malondialdehyde (MDA) and UV-absorbing compounds but reduced antioxidant enzyme activities and glutathione (GSH) and ascorbic acid (AsA) contents. Exogenous application of Put, H2S or H2O2 reduced some of the above-mentioned negative effects, but were enhanced by the addition of Put, H2S and H2O2 inhibitors. Moreover, the protective effect of Put against UV-B radiation-induced damage to hulless barley was diminished by DL-propargylglycine (PAG, a H2S biosynthesis inhibitor), hydroxylamine (HT, a H2S scavenger), diphenylene iodonium (DPI, a PM-NADPH oxidase inhibitor) and dimethylthiourea (DMTU, a ROS scavenger), and the effect of Put on H2O2 accumulation was abolished by HT. Taken together, as the downstream component of the Put signaling pathway, H2S mediated H2O2 accumulation, and H2O2 induced the accumulation of UV-absorbing compounds and maintained redox homeostasis under UV-B stress, thereby increasing the tolerance of hulless barley seedlings to UV-B stress.
Collapse
Affiliation(s)
- Qien Li
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
- Tibetan Traditional Medical Hospital of Lhari, 18 South Renmin Road, Lhari, 852000, Nagchu, China
| | - Zhaofeng Wang
- Life Science of College, Northwest Normal University, Lanzhou, 730070, Gansu, China
| | - Yanning Zhao
- Department of Biology, Qinghai University, 97 Ningzhang Road, Xining, 810016, China
| | - Xiaochen Zhang
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Shuaijun Zhang
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Letao Bo
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yao Wang
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yingfeng Ding
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Lizhe An
- School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China.
| |
Collapse
|
45
|
Liu XH, Zhang QY, Pan LL, Liu SY, Xu P, Luo XL, Zou SL, Xin H, Qu LF, Zhu YZ. NADPH oxidase 4 contributes to connective tissue growth factor expression through Smad3-dependent signaling pathway. Free Radic Biol Med 2016; 94:174-84. [PMID: 26945889 DOI: 10.1016/j.freeradbiomed.2016.02.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 02/21/2016] [Accepted: 02/28/2016] [Indexed: 01/28/2023]
Abstract
Transforming growth factor-β (TGF-β)/Smad signaling has been implicated in connective tissue growth factor (CTGF) expression in vascular smooth muscle cells (VSMC). Reactive oxygen species (ROS) are involved in activation of TGF-β/Smad signaling. However, detailed mechanisms underlying the process remain unclear. In present study, we demonstrated TGF-β1 strongly induced CTGF expression, Smad3 activation, NADPH oxidase 4 (Nox4) expression and increased ROS production in primary rat VSMC in vitro. NADPH oxidases inhibitor diphenylene iodonium (DPI) eliminated TGF-β1-induced CTGF expression and ROS generation. In addition, small-interfering RNA (siRNA) silencing of Smad3 or Nox4 significantly suppressed TGF-β1-mediated CTGF expression in VSMC. Furthermore, Nox4 silencing or inhibition eliminated TGF-β1-induced Smad3 activation and interaction between Nox4 and Smad3. In vivo studies further identified a positive correlation of Nox4 levels with Smad3 activation and CTGF expression in atherosclerotic arteries of patients and animal models. These data established that a novel mechanistic link of Nox4-dependent activation of Smad3 to increased TGF-β1-induced CTGF in the process of vascular remodeling, which suggested a new potential pathway for therapeutic interventions.
Collapse
Affiliation(s)
- Xin-Hua Liu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Qiu-Yan Zhang
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Li-Long Pan
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Si-Yu Liu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Peng Xu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Xiao-Ling Luo
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Si-Li Zou
- Department of Vascular Surgery, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China
| | - Hong Xin
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China
| | - Le-Feng Qu
- Department of Vascular Surgery, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China.
| | - Yi-Zhun Zhu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, 826, Zhangheng Road, Pudong New District, Shanghai 201203, China; School of Pharmacy, Macau University of Science and Technology, Macau.
| |
Collapse
|
46
|
Kong X, Luo Z, Dong H, Eneji AE, Li W. H2O2 and ABA signaling are responsible for the increased Na+ efflux and water uptake in Gossypium hirsutum L. roots in the non-saline side under non-uniform root zone salinity. J Exp Bot 2016; 67:2247-2261. [PMID: 26862153 DOI: 10.1093/jxb/erw026] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Non-uniform root salinity increases the Na(+)efflux, water use, and growth of the root in non-saline side, which may be regulated by some form of signaling induced by the high-salinity side. However, the signaling and its specific function have remained unknown. Using a split-root system to simulate a non-uniform root zone salinity in Gossypium hirsutum L., we showed that the up-regulated expression of sodium efflux-related genes (SOS1, SOS2, PMA1, and PMA2) and water uptake-related genes (PIP1 and PIP2) was possibly involved in the elevated Na(+) efflux and water use in the the roots in the non-saline side. The increased level of indole acetic acid (IAA) in the non-saline side was the likely cause of the increased root growth. Also, the abscisic acid (ABA) and H2O2 contents in roots in the non-saline side increased, possibly due to the increased expression of their key biosynthesis genes, NCED and RBOHC, and the decreased expression of ABA catabolic CYP707A genes. Exogenous ABA added to the non-saline side induced H2O2 generation by up-regulating the RBOHC gene, but this was decreased by exogenous fluridone. Exogenous H2O2 added to the non-saline side reduced the ABA content by down-regulating NCED genes, which can be induced by diphenylene iodonium (DPI) treatment in the non-saline side, suggesting a feedback mechanism between ABA and H2O2.Both exogenous ABA and H2O2 enhanced the expression of SOS1, PIP1;7 ,PIP2;2, and PIP2;10 genes, but these were down-regulated by fluridone and DPI, suggesting that H2O2 and ABA are important signals for increasing root Na(+) efflux and water uptake in the roots in the non-saline side.
Collapse
Affiliation(s)
- Xiangqiang Kong
- Cotton Research Center, Shandong Key Lab for Cotton Culture and Physiology, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China
| | - Zhen Luo
- Cotton Research Center, Shandong Key Lab for Cotton Culture and Physiology, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China
| | - Hezhong Dong
- Cotton Research Center, Shandong Key Lab for Cotton Culture and Physiology, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China
| | - A Egrinya Eneji
- Cotton Research Center, Shandong Key Lab for Cotton Culture and Physiology, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China
| | - Weijiang Li
- Cotton Research Center, Shandong Key Lab for Cotton Culture and Physiology, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China
| |
Collapse
|
47
|
Duan D, Fischer S, Merz P, Bogs J, Riemann M, Nick P. An ancestral allele of grapevine transcription factor MYB14 promotes plant defence. J Exp Bot 2016; 67:1795-804. [PMID: 26842984 PMCID: PMC4783363 DOI: 10.1093/jxb/erv569] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Stilbene synthase is a key enzyme for the production of the phytoalexin resveratrol. Some clones of Vitis sylvestris, a wild European grapevine species which is almost extinct, have been shown to accumulate more resveratrol in response to different forms of stress. In the current study, we asked whether the induction of stilbene synthase transcripts in Hoe29, one of the V. sylvestris clones with elevated stilbene inducibility, might result from the elevated induction of the transcription factor MYB14. The MYB14 promoter of Hoe29 and of Ke83 (a second stilbene-inducible genotype) harboured distinct regions and were applied to a promoter-reporter system. We show that stilbene synthase inducibility correlates with differences in the induction of MYB14 transcripts for these two genotypes. Both alleles were induced by UV in a promoter-reporter assay, but only the MYB14 promoter from Hoe29 was induced by flg22, consistent with the stilbene synthase expression of the donor genotypes, where both respond to UV but only Hoe29 is responsive to Plasmopara viticola during defence. We mapped upstream signals and found that a RboH-dependent oxidative burst, calcium influx, a MAPK cascade, and jasmonate activated the MYB14 promoter, whereas salicylic acid was ineffective. Our data suggest that the Hoe29 allele of the MYB14 promoter has potential as a candidate target for resistance breeding.
Collapse
Affiliation(s)
- Dong Duan
- Molecular Cell Biology, Botanical Institute 1, Karlsruhe Institute of Technology, Kaiserstr. 2, D-76131 Karlsruhe, Germany College of Life Sciences, Northwest University, Xi'an 710069, China
| | - Sabine Fischer
- Institute of Molecular Genetics, Johannes Gutenberg-University Mainz, J.-J.-Becherweg 32, D-55128 Mainz, Germany
| | - Patrick Merz
- Dienstleistungszentrum Ländlicher Raum Rheinpfalz, Breitenweg 71, Viticulture and Enology Group, D-67435 Neustadt, Germany
| | - Jochen Bogs
- Dienstleistungszentrum Ländlicher Raum Rheinpfalz, Breitenweg 71, Viticulture and Enology Group, D-67435 Neustadt, Germany Fachhochschule Bingen, D-55411 Bingen am Rhein, Germany
| | - Michael Riemann
- Molecular Cell Biology, Botanical Institute 1, Karlsruhe Institute of Technology, Kaiserstr. 2, D-76131 Karlsruhe, Germany
| | - Peter Nick
- Molecular Cell Biology, Botanical Institute 1, Karlsruhe Institute of Technology, Kaiserstr. 2, D-76131 Karlsruhe, Germany
| |
Collapse
|
48
|
Li Y, Xu S, Gao J, Pan S, Wang G. Glucose- and mannose-induced stomatal closure is mediated by ROS production, Ca(2+) and water channel in Vicia faba. Physiol Plant 2016; 156:252-61. [PMID: 26046775 DOI: 10.1111/ppl.12353] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 05/11/2015] [Indexed: 05/08/2023]
Abstract
Sugars act as vital signaling molecules that regulate plant growth, development and stress responses. However, the effects of sugars on stomatal movement have been unclear. In our study, we explored the effects of monosaccharides such as glucose and mannose on stomatal aperture. Here, we demonstrate that glucose and mannose trigger stomatal closure in a dose- and time-dependent manner in epidermal peels of broad bean (Vicia faba). Pharmacological studies revealed that glucose- and mannose-induced stomatal closure was almost completely inhibited by two reactive oxygen species (ROS) scavengers, catalase (CAT) and reduced glutathione (GSH), was significantly abolished by an NADPH oxidase inhibitor, diphenylene iodonium chloride (DPI), whereas they were hardly affected by a peroxidase inhibitor, salicylhydroxamic acid (SHAM). Furthermore, glucose- and mannose-induced stomatal closure was strongly inhibited by a Ca(2+) channel blocker, LaCl3 , a Ca(2+) chelator, ethyleneglycol-bis(beta-aminoethylether)-N,N'-tetraacetic acid (EGTA) and two water channel blockers, HgCl2 and dimethyl sulfoxide (DMSO); whereas the inhibitory effects of the water channel blockers were essentially abolished by the reversing agent β-mercaptoethanol (β-ME). These results suggest that ROS production mainly via NADPH oxidases, Ca(2+) and water channels are involved in glucose- and mannose-induced stomatal closure.
Collapse
Affiliation(s)
- Yan Li
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - ShanShan Xu
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jing Gao
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Sha Pan
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - GenXuan Wang
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| |
Collapse
|
49
|
Zhang L, Dong W, Li Q, Kang L, Zhang L, Lu Y, Zhai X. [Diphenylene iodonium and apocynin reduce the translocation and level of p47phox in PBMCs of premature infants to inhibit reactive oxygen species production]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2016; 32:59-62. [PMID: 26728380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To observe the effects of NADPH oxidase inhibitor diphenylene iodonium (DPI) and apocynin on the generation of reactive oxygen species (ROS) induced by p47phox and the mechanism of p47phox-induced ROS production under hyperoxic conditions. METHODS Peripheral blood mononuclear cells (PBMCs) were isolated from the peripheral blood (2 mL) of premature infants of less than 32 weeks without oxygen uptake. The isolated cells were divided into four groups, control group, hyperoxia group, hyperoxia and DPI group, hyperoxia and apocynin group. The control group was cultured in incubator with 50 mL/L CO(2) at 37°, and the other groups were cultured in 950 mL/L O(2) and 50 mL/L CO(2) mixed gas. After 48 hours, ROS was detected by Mitosox Red staining under a confocal laser scanning microscope; malondialdehyde (MDA) was measured by thiobarbituric acid colorimetry; the location and translocation rate of p47phox was observed by immunofluorescence staining; the level of p47phox protein was tested by Western blotting. RESULTS Compared with the hyperoxia group, the remaining three groups showed significantly decreased ROS and MDA levels and reduced translocation rate and level of p47phox. Compared with the control group, both the hyperoxia and DPI group and the hyperoxia and apocynin group were not significantly different in the above indexes. CONCLUSION DPI and apocynin can reduce hyperoxia-induced ROS production by decreasing the translocation and level of p47phox.
Collapse
Affiliation(s)
- Lingping Zhang
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Wenbin Dong
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China. *Corresponding author, E-mail:
| | - Qingping Li
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Lan Kang
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Lianyu Zhang
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Youying Lu
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Xuesong Zhai
- The First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| |
Collapse
|
50
|
Tang B, Zhang D, Li S, Xu Z, Feng X, Xu H. Enhanced poly(γ-glutamic acid) production by H 2 O 2 -induced reactive oxygen species in the fermentation of Bacillus subtilis NX-2. Biotechnol Appl Biochem 2015. [PMID: 26202728 DOI: 10.1002/bab.1416] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Effects of reactive oxygen species (ROS) on cell growth and poly(γ-glutamic acid) (γ-PGA) synthesis were studied by adding hydrogen peroxide to a medium of Bacillus subtilis NX-2. After optimizing the addition concentration and time of H2 O2 , a maximum concentration of 33.9 g/L γ-PGA was obtained by adding 100 µM H2 O2 to the medium after 24 H. This concentration was 20.6% higher than that of the control. The addition of diphenyleneiodonium chloride (ROS inhibitor) can interdict the effect of H2 O2 -induced ROS. Transcriptional levels of the cofactors and relevant genes were also determined under ROS stress to illustrate the possible metabolic mechanism contributing to the improve γ-PGA production. The transcriptional levels of genes belonging to the tricarboxylic acid cycle and electron transfer chain system were significantly increased by ROS, which decreased the NADH/NAD+ ratio and increased the ATP levels, thereby providing more reducing power and energy for γ-PGA biosynthesis. The enhanced γ-PGA synthetic genes also directly promoted the formation of γ-PGA. This study was the first to use the ROS control strategy for γ-PGA fermentation and provided valuable information on the possible mechanism by which ROS regulated γ-PGA biosynthesis in B. subtilis NX-2.
Collapse
Affiliation(s)
- Bao Tang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China
| | - Dan Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China
| | - Sha Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China
| | - Zongqi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China
| | - Xiaohai Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China.
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China.
| | - Hong Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, People's Republic of China.
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, People's Republic of China.
| |
Collapse
|